User Manual
1.0 Product Parameters
2.0 Product Safety Performance
3.0 How to Install the Product
4.0 App Installation
4.1 App Using Scene
4.2 App Operation
Battery Monitor
APP
Install the Battery Monitor to the
Vehicle Battery
1.Search “BM300” on App Store or Google Play to download App.（Fig 2）
2.Or scan the QR code printed on the package or product.（Fig 3）
App Store
4.2-1. Turn on your Bluetooth after launching the App.
4.2-4. App Interface Introduction-- Main Interface
4.2-5. App Interface Introduction—Voltage History Graph
1
2
3
5
4
6
7
8
11
1
2
10
9
12
（Fig 1）
（Fig 3）
（Fig 5）
（Fig 7）
（Fig 8）
（Fig 9）
（Fig 6）
（Fig 4）
Average Current
Input Voltage
Operating Temperature
Physical Dimensions
Voltage Accuracy
1mA
6~20V
-40℉~ 194℉
2.95”*1.97”*0.83”
±0.03V
Short-circuit Protection
Reverse Connection Protection
Bluetooth
Bluetooth Name
App Keyword
Built in
Built in
4.0
ANCEL Battery Monitor
BM300
（9-16V）
10m 10m
The bluetooth transmission range can be maximum 30 feet (10m) with no
physical obstacles in the scope.
10 11 12
ANCEL BM300 is a 12V bluetooth battery monitor, which supports voltage
test, cranking test, charging test and trip recording via bluetooth connec-
tion by App “ANCEL Battery Monitor”.
ANCEL BM300 Bluetooth Battery Monitor
1.Made of fireproof material, more resistant to high temperatures.
2.Built in electrical overload circuit breaker, automatically shutting off the
circuit if the current is too high.
3.Reverse-Polarity Protection, preventing damage to power supplies and
electronic circuits in the event of a reverse voltage applied at the input or
output terminals.
1. Connect the terminals to your batteries
with the red terminal going to the positive
pole and the black terminal to the negative
pole.
2. Keep the BM300 body settled in a
convenient location where the Bluetooth
transmission signal is not blocked.
4.2-2. Allow App access to
notifications, and you will
receive notifications of the car
battery/cranking system/charg-
ing system data and problem
detection in time.
4.2-3. Allow App access to your
location, once your phone enters
the range of the bluetooth, you will
be notified even the App is not
running.
1. The device name or ID. User can set up the nickname on the System
Setup.
2. Bluetooth connection status. Automatically connect to your mobile
device by default.
3. System Setup.
4. Status of charge display (SoC).
5. Dynamically rotate when charging.
6. Real-time battery voltage.
7. Status of health display: 1. Battery OK(Green) 2. Charging(Green) 3.
Low Power (Red).
8. Real-time voltage graph, tap on it to view the daily voltage graph .
9. Voltage test.
10. Cranking test.
11. Charging test.
12. Trip recording.
1
2 3 4 5
BM300
（Fig 2）
GET
®
10R-0514419
®
10R-0514419
BM300
ANCEL
Battery Monitor
User Manual
1.0 Product Parameters
2.0 Product Safety Performance
3.0 How to Install the Product
4.0 App Installation
4.1 App Using Scene
4.2 App Operation
Battery Monitor
APP
Install the Battery Monitor to the
Vehicle Battery
1.Search “BM300” on App Store or Google Play to download App.（Fig 2）
2.Or scan the QR code printed on the package or product.（Fig 3）
App Store
4.2-1. Turn on your Bluetooth after launching the App.
4.2-4. App Interface Introduction-- Main Interface
4.2-5. App Interface Introduction—Voltage History Graph
1
2
3
5
4
6
7
8
11
1
2
10
9
12
（Fig 1）
（Fig 3）
（Fig 5）
（Fig 7）
（Fig 8）
（Fig 9）
（Fig 6）
（Fig 4）
Average Current
Input Voltage
Operating Temperature
Physical Dimensions
Voltage Accuracy
1mA
6~20V
-40℉~ 194℉
2.95”*1.97”*0.83”
±0.03V
Short-circuit Protection
Reverse Connection Protection
Bluetooth
Bluetooth Name
App Keyword
Built in
Built in
4.0
ANCEL Battery Monitor
BM300
（9-16V）
10m 10m
The bluetooth transmission range can be maximum 30 feet (10m) with no
physical obstacles in the scope.
10 11 12
ANCEL BM300 is a 12V bluetooth battery monitor, which supports voltage
test, cranking test, charging test and trip recording via bluetooth connec-
tion by App “ANCEL Battery Monitor”.
ANCEL BM300 Bluetooth Battery Monitor
1.Made of fireproof material, more resistant to high temperatures.
2.Built in electrical overload circuit breaker, automatically shutting off the
circuit if the current is too high.
3.Reverse-Polarity Protection, preventing damage to power supplies and
electronic circuits in the event of a reverse voltage applied at the input or
output terminals.
1. Connect the terminals to your batteries
with the red terminal going to the positive
pole and the black terminal to the negative
pole.
2. Keep the BM300 body settled in a
convenient location where the Bluetooth
transmission signal is not blocked.
4.2-2. Allow App access to
notifications, and you will
receive notifications of the car
battery/cranking system/charg-
ing system data and problem
detection in time.
4.2-3. Allow App access to your
location, once your phone enters
the range of the bluetooth, you will
be notified even the App is not
running.
1. The device name or ID. User can set up the nickname on the System
Setup.
2. Bluetooth connection status. Automatically connect to your mobile
device by default.
3. System Setup.
4. Status of charge display (SoC).
5. Dynamically rotate when charging.
6. Real-time battery voltage.
7. Status of health display: 1. Battery OK(Green) 2. Charging(Green) 3.
Low Power (Red).
8. Real-time voltage graph, tap on it to view the daily voltage graph .
9. Voltage test.
10. Cranking test.
11. Charging test.
12. Trip recording.
1
2 3 4 5
BM300
（Fig 2）
GET
®
10R-0514419
®
10R-0514419
BM300
ANCEL
Battery Monitor
User Manual
1.0 Product Parameters
2.0 Product Safety Performance
3.0 How to Install the Product
4.0 App Installation
4.1 App Using Scene
4.2 App Operation
Battery Monitor
APP
Install the Battery Monitor to the
Vehicle Battery
1.Search “BM300” on App Store or Google Play to download App.（Fig 2）
2.Or scan the QR code printed on the package or product.（Fig 3）
App Store
4.2-1. Turn on your Bluetooth after launching the App.
4.2-4. App Interface Introduction-- Main Interface
4.2-5. App Interface Introduction—Voltage History Graph
1
2
3
5
4
6
7
8
11
1
2
10
9
12
（Fig 1）
（Fig 3）
（Fig 5）
（Fig 7）
（Fig 8）
（Fig 9）
（Fig 6）
（Fig 4）
Average Current
Input Voltage
Operating Temperature
Physical Dimensions
Voltage Accuracy
1mA
6~20V
-40℉~ 194℉
2.95”*1.97”*0.83”
±0.03V
Short-circuit Protection
Reverse Connection Protection
Bluetooth
Bluetooth Name
App Keyword
Built in
Built in
4.0
ANCEL Battery Monitor
BM300
（9-16V）
10m 10m
The bluetooth transmission range can be maximum 30 feet (10m) with no
physical obstacles in the scope.
10 11 12
ANCEL BM300 is a 12V bluetooth battery monitor, which supports voltage
test, cranking test, charging test and trip recording via bluetooth connec-
tion by App “ANCEL Battery Monitor”.
ANCEL BM300 Bluetooth Battery Monitor
1.Made of fireproof material, more resistant to high temperatures.
2.Built in electrical overload circuit breaker, automatically shutting off the
circuit if the current is too high.
3.Reverse-Polarity Protection, preventing damage to power supplies and
electronic circuits in the event of a reverse voltage applied at the input or
output terminals.
1. Connect the terminals to your batteries
with the red terminal going to the positive
pole and the black terminal to the negative
pole.
2. Keep the BM300 body settled in a
convenient location where the Bluetooth
transmission signal is not blocked.
4.2-2. Allow App access to
notifications, and you will
receive notifications of the car
battery/cranking system/charg-
ing system data and problem
detection in time.
4.2-3. Allow App access to your
location, once your phone enters
the range of the bluetooth, you will
be notified even the App is not
running.
1. The device name or ID. User can set up the nickname on the System
Setup.
2. Bluetooth connection status. Automatically connect to your mobile
device by default.
3. System Setup.
4. Status of charge display (SoC).
5. Dynamically rotate when charging.
6. Real-time battery voltage.
7. Status of health display: 1. Battery OK(Green) 2. Charging(Green) 3.
Low Power (Red).
8. Real-time voltage graph, tap on it to view the daily voltage graph .
9. Voltage test.
10. Cranking test.
11. Charging test.
12. Trip recording.
1
2 3 4 5
BM300
（Fig 2）
GET
®
10R-0514419
®
10R-0514419
BM300
ANCEL
Battery Monitor
User Manual
1.0 Product Parameters
2.0 Product Safety Performance
3.0 How to Install the Product
4.0 App Installation
4.1 App Using Scene
4.2 App Operation
Battery Monitor
APP
Install the Battery Monitor to the
Vehicle Battery
1.Search “BM300” on App Store or Google Play to download App.（Fig 2）
2.Or scan the QR code printed on the package or product.（Fig 3）
App Store
4.2-1. Turn on your Bluetooth after launching the App.
4.2-4. App Interface Introduction-- Main Interface
4.2-5. App Interface Introduction—Voltage History Graph
1
2
3
5
4
6
7
8
11
1
2
10
9
12
（Fig 1）
（Fig 3）
（Fig 5）
（Fig 7）
（Fig 8）
（Fig 9）
（Fig 6）
（Fig 4）
Average Current
Input Voltage
Operating Temperature
Physical Dimensions
Voltage Accuracy
1mA
6~20V
-40℉~ 194℉
2.95”*1.97”*0.83”
±0.03V
Short-circuit Protection
Reverse Connection Protection
Bluetooth
Bluetooth Name
App Keyword
Built in
Built in
4.0
ANCEL Battery Monitor
BM300
（9-16V）
10m 10m
The bluetooth transmission range can be maximum 30 feet (10m) with no
physical obstacles in the scope.
10 11 12
ANCEL BM300 is a 12V bluetooth battery monitor, which supports voltage
test, cranking test, charging test and trip recording via bluetooth connec-
tion by App “ANCEL Battery Monitor”.
ANCEL BM300 Bluetooth Battery Monitor
1.Made of fireproof material, more resistant to high temperatures.
2.Built in electrical overload circuit breaker, automatically shutting off the
circuit if the current is too high.
3.Reverse-Polarity Protection, preventing damage to power supplies and
electronic circuits in the event of a reverse voltage applied at the input or
output terminals.
1. Connect the terminals to your batteries
with the red terminal going to the positive
pole and the black terminal to the negative
pole.
2. Keep the BM300 body settled in a
convenient location where the Bluetooth
transmission signal is not blocked.
4.2-2. Allow App access to
notifications, and you will
receive notifications of the car
battery/cranking system/charg-
ing system data and problem
detection in time.
4.2-3. Allow App access to your
location, once your phone enters
the range of the bluetooth, you will
be notified even the App is not
running.
1. The device name or ID. User can set up the nickname on the System
Setup.
2. Bluetooth connection status. Automatically connect to your mobile
device by default.
3. System Setup.
4. Status of charge display (SoC).
5. Dynamically rotate when charging.
6. Real-time battery voltage.
7. Status of health display: 1. Battery OK(Green) 2. Charging(Green) 3.
Low Power (Red).
8. Real-time voltage graph, tap on it to view the daily voltage graph .
9. Voltage test.
10. Cranking test.
11. Charging test.
12. Trip recording.
1
2 3 4 5
BM300
（Fig 2）
GET
®
10R-0514419
®
10R-0514419
BM300
ANCEL
Battery Monitor
User Manual
1.0 Product Parameters
2.0 Product Safety Performance
3.0 How to Install the Product
4.0 App Installation
4.1 App Using Scene
4.2 App Operation
Battery Monitor
APP
Install the Battery Monitor to the
Vehicle Battery
1.Search “BM300” on App Store or Google Play to download App.（Fig 2）
2.Or scan the QR code printed on the package or product.（Fig 3）
App Store
4.2-1. Turn on your Bluetooth after launching the App.
4.2-4. App Interface Introduction-- Main Interface
4.2-5. App Interface Introduction—Voltage History Graph
1
2
3
5
4
6
7
8
11
1
2
10
9
12
（Fig 1）
（Fig 3）
（Fig 5）
（Fig 7）
（Fig 8）
（Fig 9）
（Fig 6）
（Fig 4）
Average Current
Input Voltage
Operating Temperature
Physical Dimensions
Voltage Accuracy
1mA
6~20V
-40℉~ 194℉
2.95”*1.97”*0.83”
±0.03V
Short-circuit Protection
Reverse Connection Protection
Bluetooth
Bluetooth Name
App Keyword
Built in
Built in
4.0
ANCEL Battery Monitor
BM300
（9-16V）
10m 10m
The bluetooth transmission range can be maximum 30 feet (10m) with no
physical obstacles in the scope.
10 11 12
ANCEL BM300 is a 12V bluetooth battery monitor, which supports voltage
test, cranking test, charging test and trip recording via bluetooth connec-
tion by App “ANCEL Battery Monitor”.
ANCEL BM300 Bluetooth Battery Monitor
1.Made of fireproof material, more resistant to high temperatures.
2.Built in electrical overload circuit breaker, automatically shutting off the
circuit if the current is too high.
3.Reverse-Polarity Protection, preventing damage to power supplies and
electronic circuits in the event of a reverse voltage applied at the input or
output terminals.
1. Connect the terminals to your batteries
with the red terminal going to the positive
pole and the black terminal to the negative
pole.
2. Keep the BM300 body settled in a
convenient location where the Bluetooth
transmission signal is not blocked.
4.2-2. Allow App access to
notifications, and you will
receive notifications of the car
battery/cranking system/charg-
ing system data and problem
detection in time.
4.2-3. Allow App access to your
location, once your phone enters
the range of the bluetooth, you will
be notified even the App is not
running.
1. The device name or ID. User can set up the nickname on the System
Setup.
2. Bluetooth connection status. Automatically connect to your mobile
device by default.
3. System Setup.
4. Status of charge display (SoC).
5. Dynamically rotate when charging.
6. Real-time battery voltage.
7. Status of health display: 1. Battery OK(Green) 2. Charging(Green) 3.
Low Power (Red).
8. Real-time voltage graph, tap on it to view the daily voltage graph .
9. Voltage test.
10. Cranking test.
11. Charging test.
12. Trip recording.
1
2 3 4 5
BM300
（Fig 2）
GET
®
10R-0514419
®
10R-0514419
BM300
ANCEL
Battery Monitor
User Manual
1.0 Product Parameters
2.0 Product Safety Performance
3.0 How to Install the Product
4.0 App Installation
4.1 App Using Scene
4.2 App Operation
Battery Monitor
APP
Install the Battery Monitor to the
Vehicle Battery
1.Search “BM300” on App Store or Google Play to download App.（Fig 2）
2.Or scan the QR code printed on the package or product.（Fig 3）
App Store
4.2-1. Turn on your Bluetooth after launching the App.
4.2-4. App Interface Introduction-- Main Interface
4.2-5. App Interface Introduction—Voltage History Graph
1
2
3
5
4
6
7
8
11
1
2
10
9
12
（Fig 1）
（Fig 3）
（Fig 5）
（Fig 7）
（Fig 8）
（Fig 9）
（Fig 6）
（Fig 4）
Average Current
Input Voltage
Operating Temperature
Physical Dimensions
Voltage Accuracy
1mA
6~20V
-40℉~ 194℉
2.95”*1.97”*0.83”
±0.03V
Short-circuit Protection
Reverse Connection Protection
Bluetooth
Bluetooth Name
App Keyword
Built in
Built in
4.0
ANCEL Battery Monitor
BM300
（9-16V）
10m 10m
The bluetooth transmission range can be maximum 30 feet (10m) with no
physical obstacles in the scope.
10 11 12
ANCEL BM300 is a 12V bluetooth battery monitor, which supports voltage
test, cranking test, charging test and trip recording via bluetooth connec-
tion by App “ANCEL Battery Monitor”.
ANCEL BM300 Bluetooth Battery Monitor
1.Made of fireproof material, more resistant to high temperatures.
2.Built in electrical overload circuit breaker, automatically shutting off the
circuit if the current is too high.
3.Reverse-Polarity Protection, preventing damage to power supplies and
electronic circuits in the event of a reverse voltage applied at the input or
output terminals.
1. Connect the terminals to your batteries
with the red terminal going to the positive
pole and the black terminal to the negative
pole.
2. Keep the BM300 body settled in a
convenient location where the Bluetooth
transmission signal is not blocked.
4.2-2. Allow App access to
notifications, and you will
receive notifications of the car
battery/cranking system/charg-
ing system data and problem
detection in time.
4.2-3. Allow App access to your
location, once your phone enters
the range of the bluetooth, you will
be notified even the App is not
running.
1. The device name or ID. User can set up the nickname on the System
Setup.
2. Bluetooth connection status. Automatically connect to your mobile
device by default.
3. System Setup.
4. Status of charge display (SoC).
5. Dynamically rotate when charging.
6. Real-time battery voltage.
7. Status of health display: 1. Battery OK(Green) 2. Charging(Green) 3.
Low Power (Red).
8. Real-time voltage graph, tap on it to view the daily voltage graph .
9. Voltage test.
10. Cranking test.
11. Charging test.
12. Trip recording.
1
2 3 4 5
BM300
（Fig 2）
GET
®
10R-0514419
®
10R-0514419
BM300
ANCEL
Battery Monitor
4.2-6. App Interface Introduction—System Setup
（Fig 10）
（Fig 11）
（Fig 12）（Fig 13）
（Fig 14）
4.2-7. App Interface In troduction—Cranking Test
4.2-8. App Interface Introduction-- Charging Test
4.2-9. App Interface Introduction-- Trip Record
2
3
4
5
7
6
1. Daily Power Notification: green
means on, gray means off. The
frequency of notification can be
set.
2. Abnormal cranking Notification:
The frequency of notification can
be set.
3. Power alarm.
Slide the two bell icons to set the
parameters. User will receive app
notification about status of charge
when battery power drops to the
set point.
1
2
3
4
5
6
7
1. Engine start time.
2. Cranking test: when the engine
starts, the device will test the
cranking system automatically and
store the test result. Usually, it’s
normal if the cranking voltage is
higher than 9.6V, while abnormal if
the cranking voltage is less than
9.6V. If the voltage is too low, it
might result from aging of battery,
low power or starter fault, etc.
3. Display the cranking voltage
values, green means normal, red
means abnormal.
4. The cranking voltage graph.
5. Can display the recent two test
results, the orange dot means the
selected page.
1
1
2
3
4
5
1. Click “Start Testing”, it will
automatically test idle condition
voltage, then jump to Second Step.
2. High RPM Voltage Test:
increase RPM as below and hold
for 3-5 seconds until the test is
completed.
4cyl - 2500/min
6cyl - 2000/min
8cyl - 1600/min
3. Interpretation of charging
voltage test
3-1. Charging Voltage: normal
Shows the alternator output is
normal, no problem is detected.
3-2. Charging Voltage: low
Problem is detected. Please check if engine transmission belt slips/discon-
nects or not. Check whether the cable connection between alternator and
battery is normal or not. If transmission belt and cable connection are good,
please refer to the car manufacturer’s recommendations to exclude the
alternator failure.
3-3. Charging Voltage: high
Problem is detected. Since most of automotive engines adapt built-in
regulator, you need to replace alternator assembly(Old vehicle use external
regulator, please replace regulator directly). Common voltage limits for
automotive regulator is 14.7±0.5V. A high charging voltage can overcharge
the battery and shorten its life and cause it to malfunction.
3-4. No Voltage Output: no engine voltage output is detected
Check that the alternator cable and alternator belt are working properly.
4. Charging test finished time.
5. Voltage under idle test, green means OK, red means abnormal.
6. High RPM voltage test, green means OK, red means abnormal.
7. Click button to re-test.
1. Click search button to view
driving records via selecting
date.
2. Date separator bar, specific
to a certain day.
3. Start, running and end time of
each driving.
（Fig 15）
2
3
1
1. Date selection: Tap on the date in the upper right to enter a calender,
where date in red means abnormal voltage on the day(s).
2. Historical voltage graph: A slider appears when you tap on the graph,
displaying the test time on the top of it and the battery voltage.
4. Bluetooth Device Setup: tap on it to enter Bluetooth device system
setup. User can search for nearby devices or view previously connected
devices. Bluetooth device name can be customized.
5. Hardware installation: user can view the installation introductions.
6. Firmware Upgrade: user can view the software version or upgrade to
the new firmware when new version is available.
7. Version: display the current app version number.
1. The product should not exceed the specified voltage range (6-20V).
Excessive input voltage may damage the device.
2. App requires smart phones with Android 4.3 and higher, iPhone 4S
and higher.
3. The mobile device will receive a notification when it enters the
Bluetooth range.
4. If you select "not allowed to access location" for the first time, you
will not receive a notification reminder. Please turn on the location in
phone settings by selecting “always allow location access”.
5. If the daily test alert function is turned off, it will not be notified even if
your mobile phone is close to the tester. Please set to allow notification
in your app and phone’s settings.
6. If the exception test alert function is turned off, you will not be notified
even if the mobile phone is close to the device. Please set to allow
notification in your app and phone’s settings.
7. Open the app and wait for the data synchronization before updating
the firmware, otherwise the update will clear all data in the tester.
8. All historical data will be stored on the phone, and app update will
not lose historical data. However, if the app is uninstalled, the mobile
terminal data will be cleared.
9. The device will automatically monitor the vehicle's battery, cranking
and charging systems, which can store up to 31 days of data. Please
use the app at least once every 31 days. And make sure the device
history data will has been synced to the phone before remove it from
the battery otherwise all data will be cleared.
10. If your mobile phone and the tester cannot be connected via
bluetooth, make sure that your mobile bluetooth is turned on and close
to the device without hindrance.
5.0 Tips
Battery Monitor
9876 10
®
4.2-6. App Interface Introduction—System Setup
（Fig 10）
（Fig 11）
（Fig 12）（Fig 13）
（Fig 14）
4.2-7. App Interface In troduction—Cranking Test
4.2-8. App Interface Introduction-- Charging Test
4.2-9. App Interface Introduction-- Trip Record
2
3
4
5
7
6
1. Daily Power Notification: green
means on, gray means off. The
frequency of notification can be
set.
2. Abnormal cranking Notification:
The frequency of notification can
be set.
3. Power alarm.
Slide the two bell icons to set the
parameters. User will receive app
notification about status of charge
when battery power drops to the
set point.
1
2
3
4
5
6
7
1. Engine start time.
2. Cranking test: when the engine
starts, the device will test the
cranking system automatically and
store the test result. Usually, it’s
normal if the cranking voltage is
higher than 9.6V, while abnormal if
the cranking voltage is less than
9.6V. If the voltage is too low, it
might result from aging of battery,
low power or starter fault, etc.
3. Display the cranking voltage
values, green means normal, red
means abnormal.
4. The cranking voltage graph.
5. Can display the recent two test
results, the orange dot means the
selected page.
1
1
2
3
4
5
1. Click “Start Testing”, it will
automatically test idle condition
voltage, then jump to Second Step.
2. High RPM Voltage Test:
increase RPM as below and hold
for 3-5 seconds until the test is
completed.
4cyl - 2500/min
6cyl - 2000/min
8cyl - 1600/min
3. Interpretation of charging
voltage test
3-1. Charging Voltage: normal
Shows the alternator output is
normal, no problem is detected.
3-2. Charging Voltage: low
Problem is detected. Please check if engine transmission belt slips/discon-
nects or not. Check whether the cable connection between alternator and
battery is normal or not. If transmission belt and cable connection are good,
please refer to the car manufacturer’s recommendations to exclude the
alternator failure.
3-3. Charging Voltage: high
Problem is detected. Since most of automotive engines adapt built-in
regulator, you need to replace alternator assembly(Old vehicle use external
regulator, please replace regulator directly). Common voltage limits for
automotive regulator is 14.7±0.5V. A high charging voltage can overcharge
the battery and shorten its life and cause it to malfunction.
3-4. No Voltage Output: no engine voltage output is detected
Check that the alternator cable and alternator belt are working properly.
4. Charging test finished time.
5. Voltage under idle test, green means OK, red means abnormal.
6. High RPM voltage test, green means OK, red means abnormal.
7. Click button to re-test.
1. Click search button to view
driving records via selecting
date.
2. Date separator bar, specific
to a certain day.
3. Start, running and end time of
each driving.
（Fig 15）
2
3
1
1. Date selection: Tap on the date in the upper right to enter a calender,
where date in red means abnormal voltage on the day(s).
2. Historical voltage graph: A slider appears when you tap on the graph,
displaying the test time on the top of it and the battery voltage.
4. Bluetooth Device Setup: tap on it to enter Bluetooth device system
setup. User can search for nearby devices or view previously connected
devices. Bluetooth device name can be customized.
5. Hardware installation: user can view the installation introductions.
6. Firmware Upgrade: user can view the software version or upgrade to
the new firmware when new version is available.
7. Version: display the current app version number.
1. The product should not exceed the specified voltage range (6-20V).
Excessive input voltage may damage the device.
2. App requires smart phones with Android 4.3 and higher, iPhone 4S
and higher.
3. The mobile device will receive a notification when it enters the
Bluetooth range.
4. If you select "not allowed to access location" for the first time, you
will not receive a notification reminder. Please turn on the location in
phone settings by selecting “always allow location access”.
5. If the daily test alert function is turned off, it will not be notified even if
your mobile phone is close to the tester. Please set to allow notification
in your app and phone’s settings.
6. If the exception test alert function is turned off, you will not be notified
even if the mobile phone is close to the device. Please set to allow
notification in your app and phone’s settings.
7. Open the app and wait for the data synchronization before updating
the firmware, otherwise the update will clear all data in the tester.
8. All historical data will be stored on the phone, and app update will
not lose historical data. However, if the app is uninstalled, the mobile
terminal data will be cleared.
9. The device will automatically monitor the vehicle's battery, cranking
and charging systems, which can store up to 31 days of data. Please
use the app at least once every 31 days. And make sure the device
history data will has been synced to the phone before remove it from
the battery otherwise all data will be cleared.
10. If your mobile phone and the tester cannot be connected via
bluetooth, make sure that your mobile bluetooth is turned on and close
to the device without hindrance.
5.0 Tips
Battery Monitor
9876 10
®
4.2-6. App Interface Introduction—System Setup
（Fig 10）
（Fig 11）
（Fig 12）（Fig 13）
（Fig 14）
4.2-7. App Interface In troduction—Cranking Test
4.2-8. App Interface Introduction-- Charging Test
4.2-9. App Interface Introduction-- Trip Record
2
3
4
5
7
6
1. Daily Power Notification: green
means on, gray means off. The
frequency of notification can be
set.
2. Abnormal cranking Notification:
The frequency of notification can
be set.
3. Power alarm.
Slide the two bell icons to set the
parameters. User will receive app
notification about status of charge
when battery power drops to the
set point.
1
2
3
4
5
6
7
1. Engine start time.
2. Cranking test: when the engine
starts, the device will test the
cranking system automatically and
store the test result. Usually, it’s
normal if the cranking voltage is
higher than 9.6V, while abnormal if
the cranking voltage is less than
9.6V. If the voltage is too low, it
might result from aging of battery,
low power or starter fault, etc.
3. Display the cranking voltage
values, green means normal, red
means abnormal.
4. The cranking voltage graph.
5. Can display the recent two test
results, the orange dot means the
selected page.
1
1
2
3
4
5
1. Click “Start Testing”, it will
automatically test idle condition
voltage, then jump to Second Step.
2. High RPM Voltage Test:
increase RPM as below and hold
for 3-5 seconds until the test is
completed.
4cyl - 2500/min
6cyl - 2000/min
8cyl - 1600/min
3. Interpretation of charging
voltage test
3-1. Charging Voltage: normal
Shows the alternator output is
normal, no problem is detected.
3-2. Charging Voltage: low
Problem is detected. Please check if engine transmission belt slips/discon-
nects or not. Check whether the cable connection between alternator and
battery is normal or not. If transmission belt and cable connection are good,
please refer to the car manufacturer’s recommendations to exclude the
alternator failure.
3-3. Charging Voltage: high
Problem is detected. Since most of automotive engines adapt built-in
regulator, you need to replace alternator assembly(Old vehicle use external
regulator, please replace regulator directly). Common voltage limits for
automotive regulator is 14.7±0.5V. A high charging voltage can overcharge
the battery and shorten its life and cause it to malfunction.
3-4. No Voltage Output: no engine voltage output is detected
Check that the alternator cable and alternator belt are working properly.
4. Charging test finished time.
5. Voltage under idle test, green means OK, red means abnormal.
6. High RPM voltage test, green means OK, red means abnormal.
7. Click button to re-test.
1. Click search button to view
driving records via selecting
date.
2. Date separator bar, specific
to a certain day.
3. Start, running and end time of
each driving.
（Fig 15）
2
3
1
1. Date selection: Tap on the date in the upper right to enter a calender,
where date in red means abnormal voltage on the day(s).
2. Historical voltage graph: A slider appears when you tap on the graph,
displaying the test time on the top of it and the battery voltage.
4. Bluetooth Device Setup: tap on it to enter Bluetooth device system
setup. User can search for nearby devices or view previously connected
devices. Bluetooth device name can be customized.
5. Hardware installation: user can view the installation introductions.
6. Firmware Upgrade: user can view the software version or upgrade to
the new firmware when new version is available.
7. Version: display the current app version number.
1. The product should not exceed the specified voltage range (6-20V).
Excessive input voltage may damage the device.
2. App requires smart phones with Android 4.3 and higher, iPhone 4S
and higher.
3. The mobile device will receive a notification when it enters the
Bluetooth range.
4. If you select "not allowed to access location" for the first time, you
will not receive a notification reminder. Please turn on the location in
phone settings by selecting “always allow location access”.
5. If the daily test alert function is turned off, it will not be notified even if
your mobile phone is close to the tester. Please set to allow notification
in your app and phone’s settings.
6. If the exception test alert function is turned off, you will not be notified
even if the mobile phone is close to the device. Please set to allow
notification in your app and phone’s settings.
7. Open the app and wait for the data synchronization before updating
the firmware, otherwise the update will clear all data in the tester.
8. All historical data will be stored on the phone, and app update will
not lose historical data. However, if the app is uninstalled, the mobile
terminal data will be cleared.
9. The device will automatically monitor the vehicle's battery, cranking
and charging systems, which can store up to 31 days of data. Please
use the app at least once every 31 days. And make sure the device
history data will has been synced to the phone before remove it from
the battery otherwise all data will be cleared.
10. If your mobile phone and the tester cannot be connected via
bluetooth, make sure that your mobile bluetooth is turned on and close
to the device without hindrance.
5.0 Tips
Battery Monitor
9876 10
®
4.2-6. App Interface Introduction—System Setup
（Fig 10）
（Fig 11）
（Fig 12）（Fig 13）
（Fig 14）
4.2-7. App Interface In troduction—Cranking Test
4.2-8. App Interface Introduction-- Charging Test
4.2-9. App Interface Introduction-- Trip Record
2
3
4
5
7
6
1. Daily Power Notification: green
means on, gray means off. The
frequency of notification can be
set.
2. Abnormal cranking Notification:
The frequency of notification can
be set.
3. Power alarm.
Slide the two bell icons to set the
parameters. User will receive app
notification about status of charge
when battery power drops to the
set point.
1
2
3
4
5
6
7
1. Engine start time.
2. Cranking test: when the engine
starts, the device will test the
cranking system automatically and
store the test result. Usually, it’s
normal if the cranking voltage is
higher than 9.6V, while abnormal if
the cranking voltage is less than
9.6V. If the voltage is too low, it
might result from aging of battery,
low power or starter fault, etc.
3. Display the cranking voltage
values, green means normal, red
means abnormal.
4. The cranking voltage graph.
5. Can display the recent two test
results, the orange dot means the
selected page.
1
1
2
3
4
5
1. Click “Start Testing”, it will
automatically test idle condition
voltage, then jump to Second Step.
2. High RPM Voltage Test:
increase RPM as below and hold
for 3-5 seconds until the test is
completed.
4cyl - 2500/min
6cyl - 2000/min
8cyl - 1600/min
3. Interpretation of charging
voltage test
3-1. Charging Voltage: normal
Shows the alternator output is
normal, no problem is detected.
3-2. Charging Voltage: low
Problem is detected. Please check if engine transmission belt slips/discon-
nects or not. Check whether the cable connection between alternator and
battery is normal or not. If transmission belt and cable connection are good,
please refer to the car manufacturer’s recommendations to exclude the
alternator failure.
3-3. Charging Voltage: high
Problem is detected. Since most of automotive engines adapt built-in
regulator, you need to replace alternator assembly(Old vehicle use external
regulator, please replace regulator directly). Common voltage limits for
automotive regulator is 14.7±0.5V. A high charging voltage can overcharge
the battery and shorten its life and cause it to malfunction.
3-4. No Voltage Output: no engine voltage output is detected
Check that the alternator cable and alternator belt are working properly.
4. Charging test finished time.
5. Voltage under idle test, green means OK, red means abnormal.
6. High RPM voltage test, green means OK, red means abnormal.
7. Click button to re-test.
1. Click search button to view
driving records via selecting
date.
2. Date separator bar, specific
to a certain day.
3. Start, running and end time of
each driving.
（Fig 15）
2
3
1
1. Date selection: Tap on the date in the upper right to enter a calender,
where date in red means abnormal voltage on the day(s).
2. Historical voltage graph: A slider appears when you tap on the graph,
displaying the test time on the top of it and the battery voltage.
4. Bluetooth Device Setup: tap on it to enter Bluetooth device system
setup. User can search for nearby devices or view previously connected
devices. Bluetooth device name can be customized.
5. Hardware installation: user can view the installation introductions.
6. Firmware Upgrade: user can view the software version or upgrade to
the new firmware when new version is available.
7. Version: display the current app version number.
1. The product should not exceed the specified voltage range (6-20V).
Excessive input voltage may damage the device.
2. App requires smart phones with Android 4.3 and higher, iPhone 4S
and higher.
3. The mobile device will receive a notification when it enters the
Bluetooth range.
4. If you select "not allowed to access location" for the first time, you
will not receive a notification reminder. Please turn on the location in
phone settings by selecting “always allow location access”.
5. If the daily test alert function is turned off, it will not be notified even if
your mobile phone is close to the tester. Please set to allow notification
in your app and phone’s settings.
6. If the exception test alert function is turned off, you will not be notified
even if the mobile phone is close to the device. Please set to allow
notification in your app and phone’s settings.
7. Open the app and wait for the data synchronization before updating
the firmware, otherwise the update will clear all data in the tester.
8. All historical data will be stored on the phone, and app update will
not lose historical data. However, if the app is uninstalled, the mobile
terminal data will be cleared.
9. The device will automatically monitor the vehicle's battery, cranking
and charging systems, which can store up to 31 days of data. Please
use the app at least once every 31 days. And make sure the device
history data will has been synced to the phone before remove it from
the battery otherwise all data will be cleared.
10. If your mobile phone and the tester cannot be connected via
bluetooth, make sure that your mobile bluetooth is turned on and close
to the device without hindrance.
5.0 Tips
Battery Monitor
9876 10
®
4.2-6. App Interface Introduction—System Setup
（Fig 10）
（Fig 11）
（Fig 12）（Fig 13）
（Fig 14）
4.2-7. App Interface In troduction—Cranking Test
4.2-8. App Interface Introduction-- Charging Test
4.2-9. App Interface Introduction-- Trip Record
2
3
4
5
7
6
1. Daily Power Notification: green
means on, gray means off. The
frequency of notification can be
set.
2. Abnormal cranking Notification:
The frequency of notification can
be set.
3. Power alarm.
Slide the two bell icons to set the
parameters. User will receive app
notification about status of charge
when battery power drops to the
set point.
1
2
3
4
5
6
7
1. Engine start time.
2. Cranking test: when the engine
starts, the device will test the
cranking system automatically and
store the test result. Usually, it’s
normal if the cranking voltage is
higher than 9.6V, while abnormal if
the cranking voltage is less than
9.6V. If the voltage is too low, it
might result from aging of battery,
low power or starter fault, etc.
3. Display the cranking voltage
values, green means normal, red
means abnormal.
4. The cranking voltage graph.
5. Can display the recent two test
results, the orange dot means the
selected page.
1
1
2
3
4
5
1. Click “Start Testing”, it will
automatically test idle condition
voltage, then jump to Second Step.
2. High RPM Voltage Test:
increase RPM as below and hold
for 3-5 seconds until the test is
completed.
4cyl - 2500/min
6cyl - 2000/min
8cyl - 1600/min
3. Interpretation of charging
voltage test
3-1. Charging Voltage: normal
Shows the alternator output is
normal, no problem is detected.
3-2. Charging Voltage: low
Problem is detected. Please check if engine transmission belt slips/discon-
nects or not. Check whether the cable connection between alternator and
battery is normal or not. If transmission belt and cable connection are good,
please refer to the car manufacturer’s recommendations to exclude the
alternator failure.
3-3. Charging Voltage: high
Problem is detected. Since most of automotive engines adapt built-in
regulator, you need to replace alternator assembly(Old vehicle use external
regulator, please replace regulator directly). Common voltage limits for
automotive regulator is 14.7±0.5V. A high charging voltage can overcharge
the battery and shorten its life and cause it to malfunction.
3-4. No Voltage Output: no engine voltage output is detected
Check that the alternator cable and alternator belt are working properly.
4. Charging test finished time.
5. Voltage under idle test, green means OK, red means abnormal.
6. High RPM voltage test, green means OK, red means abnormal.
7. Click button to re-test.
1. Click search button to view
driving records via selecting
date.
2. Date separator bar, specific
to a certain day.
3. Start, running and end time of
each driving.
（Fig 15）
2
3
1
1. Date selection: Tap on the date in the upper right to enter a calender,
where date in red means abnormal voltage on the day(s).
2. Historical voltage graph: A slider appears when you tap on the graph,
displaying the test time on the top of it and the battery voltage.
4. Bluetooth Device Setup: tap on it to enter Bluetooth device system
setup. User can search for nearby devices or view previously connected
devices. Bluetooth device name can be customized.
5. Hardware installation: user can view the installation introductions.
6. Firmware Upgrade: user can view the software version or upgrade to
the new firmware when new version is available.
7. Version: display the current app version number.
1. The product should not exceed the specified voltage range (6-20V).
Excessive input voltage may damage the device.
2. App requires smart phones with Android 4.3 and higher, iPhone 4S
and higher.
3. The mobile device will receive a notification when it enters the
Bluetooth range.
4. If you select "not allowed to access location" for the first time, you
will not receive a notification reminder. Please turn on the location in
phone settings by selecting “always allow location access”.
5. If the daily test alert function is turned off, it will not be notified even if
your mobile phone is close to the tester. Please set to allow notification
in your app and phone’s settings.
6. If the exception test alert function is turned off, you will not be notified
even if the mobile phone is close to the device. Please set to allow
notification in your app and phone’s settings.
7. Open the app and wait for the data synchronization before updating
the firmware, otherwise the update will clear all data in the tester.
8. All historical data will be stored on the phone, and app update will
not lose historical data. However, if the app is uninstalled, the mobile
terminal data will be cleared.
9. The device will automatically monitor the vehicle's battery, cranking
and charging systems, which can store up to 31 days of data. Please
use the app at least once every 31 days. And make sure the device
history data will has been synced to the phone before remove it from
the battery otherwise all data will be cleared.
10. If your mobile phone and the tester cannot be connected via
bluetooth, make sure that your mobile bluetooth is turned on and close
to the device without hindrance.
5.0 Tips
Battery Monitor
9876 10
®
4.2-6. App Interface Introduction—System Setup
（Fig 10）
（Fig 11）
（Fig 12）（Fig 13）
（Fig 14）
4.2-7. App Interface In troduction—Cranking Test
4.2-8. App Interface Introduction-- Charging Test
4.2-9. App Interface Introduction-- Trip Record
2
3
4
5
7
6
1. Daily Power Notification: green
means on, gray means off. The
frequency of notification can be
set.
2. Abnormal cranking Notification:
The frequency of notification can
be set.
3. Power alarm.
Slide the two bell icons to set the
parameters. User will receive app
notification about status of charge
when battery power drops to the
set point.
1
2
3
4
5
6
7
1. Engine start time.
2. Cranking test: when the engine
starts, the device will test the
cranking system automatically and
store the test result. Usually, it’s
normal if the cranking voltage is
higher than 9.6V, while abnormal if
the cranking voltage is less than
9.6V. If the voltage is too low, it
might result from aging of battery,
low power or starter fault, etc.
3. Display the cranking voltage
values, green means normal, red
means abnormal.
4. The cranking voltage graph.
5. Can display the recent two test
results, the orange dot means the
selected page.
1
1
2
3
4
5
1. Click “Start Testing”, it will
automatically test idle condition
voltage, then jump to Second Step.
2. High RPM Voltage Test:
increase RPM as below and hold
for 3-5 seconds until the test is
completed.
4cyl - 2500/min
6cyl - 2000/min
8cyl - 1600/min
3. Interpretation of charging
voltage test
3-1. Charging Voltage: normal
Shows the alternator output is
normal, no problem is detected.
3-2. Charging Voltage: low
Problem is detected. Please check if engine transmission belt slips/discon-
nects or not. Check whether the cable connection between alternator and
battery is normal or not. If transmission belt and cable connection are good,
please refer to the car manufacturer’s recommendations to exclude the
alternator failure.
3-3. Charging Voltage: high
Problem is detected. Since most of automotive engines adapt built-in
regulator, you need to replace alternator assembly(Old vehicle use external
regulator, please replace regulator directly). Common voltage limits for
automotive regulator is 14.7±0.5V. A high charging voltage can overcharge
the battery and shorten its life and cause it to malfunction.
3-4. No Voltage Output: no engine voltage output is detected
Check that the alternator cable and alternator belt are working properly.
4. Charging test finished time.
5. Voltage under idle test, green means OK, red means abnormal.
6. High RPM voltage test, green means OK, red means abnormal.
7. Click button to re-test.
1. Click search button to view
driving records via selecting
date.
2. Date separator bar, specific
to a certain day.
3. Start, running and end time of
each driving.
（Fig 15）
2
3
1
1. Date selection: Tap on the date in the upper right to enter a calender,
where date in red means abnormal voltage on the day(s).
2. Historical voltage graph: A slider appears when you tap on the graph,
displaying the test time on the top of it and the battery voltage.
4. Bluetooth Device Setup: tap on it to enter Bluetooth device system
setup. User can search for nearby devices or view previously connected
devices. Bluetooth device name can be customized.
5. Hardware installation: user can view the installation introductions.
6. Firmware Upgrade: user can view the software version or upgrade to
the new firmware when new version is available.
7. Version: display the current app version number.
1. The product should not exceed the specified voltage range (6-20V).
Excessive input voltage may damage the device.
2. App requires smart phones with Android 4.3 and higher, iPhone 4S
and higher.
3. The mobile device will receive a notification when it enters the
Bluetooth range.
4. If you select "not allowed to access location" for the first time, you
will not receive a notification reminder. Please turn on the location in
phone settings by selecting “always allow location access”.
5. If the daily test alert function is turned off, it will not be notified even if
your mobile phone is close to the tester. Please set to allow notification
in your app and phone’s settings.
6. If the exception test alert function is turned off, you will not be notified
even if the mobile phone is close to the device. Please set to allow
notification in your app and phone’s settings.
7. Open the app and wait for the data synchronization before updating
the firmware, otherwise the update will clear all data in the tester.
8. All historical data will be stored on the phone, and app update will
not lose historical data. However, if the app is uninstalled, the mobile
terminal data will be cleared.
9. The device will automatically monitor the vehicle's battery, cranking
and charging systems, which can store up to 31 days of data. Please
use the app at least once every 31 days. And make sure the device
history data will has been synced to the phone before remove it from
the battery otherwise all data will be cleared.
10. If your mobile phone and the tester cannot be connected via
bluetooth, make sure that your mobile bluetooth is turned on and close
to the device without hindrance.
5.0 Tips
Battery Monitor
9876 10
®
