
POWER TANK
INSTRUCTION MANUAL
MODEL #18777
5. TO REMOVE BATTERY FOR DISPOSAL
This rechargeable power tank is powered by a sealed
lead-acid battery, one PC (12V 17 Ah/20 HR).
+
Make sure the PowerTank is in the “OFF” position
before removing battery. (FIG. 21)
+
Make sure the PowerTank is disconnected from the
charger which must be OFF from the electric supply.
(FIG. 23)
+
Remove the spotlight by loosening the screw.
+
Face the PowerTank down and open into 2 halves
by unscrewing screws counterclockwise. (FIG. 22)
+
Cut wires to remove battery.
CAUTION: There may be electric shock.
F.21
6. TROUBLESHOOTING
PROBLEM POSSIBLE SOLUTION
1. No LED indicator (low or charge) when
switch in “on” position
Circuit breaker cut off circuit Reset the circuit breaker according
to the instruction
2. No LED indicator (full or charge) when
recharging
Circuit breaker cut off circuit Reset the circuit breaker according
to the instruction
3. DC-12V output doesn’t work when
switch in “on” position
Circuit breaker cut off circuit Reset the circuit breaker according
to the instruction
4. USB output doesn’t work when switch
in “on” position
Fuse was broken Replace the fuse according to the
instruction
7. STARTING AID FOR MOTOR VEHICLES
+
The jumper cable terminals are located at the back
of unit under a black hinged cover
+
Use only jumper cables of sufficient gauge
(cross section)
+
The PowerTank can only be
used as a starting aid when the
vehicle’s battery is only partially
discharged. Thus, only a limited
capacity can be transferred
into the vehicle’s battery.
HOW TO USE THE POWERTANK TO START A VEHICLE:
+
The ON/OFF switch can be set to”ON” or “OFF”
position for the starting aid function.
+
Connect the POSITIVE pole (+) of the PowerTank
to the POSITIVE pole (+) of the vehicle battery.
+
Connect the NEGATIVE pole (-) of the PowerTank
to the NEGATIVE pole (-) of the vehicle battery.
+
Leave the PowerTank connected to the vehicle
battery for around 20 minutes.
+
After approximately 20 minutes, disconnect the
jumper cable from the NEGATIVE pole (-) of the
vehicle battery.
+
Then disconnect the jumper cable from the
POSITIVE pole (+) of the vehicle battery.
+
This partial charge should be sufficient to start
the vehicle.
+
The PowerTank needs to be recharged after
using as a starting aid.
WARNING:The Fuse and Switch is no function on the connect
( + ) ( - ) pole, current flows directly from the battery. Once the jumper
cables are connected, NEVER allow the cables to touch together or
be left on the same metal surface, this will result in short circuit and
may start a fire. NEVER ATTEMPT TO START THE VEHICLE WITH THE
POWER TANK CONNECTED.
8. SPECIFICATION
Batteries: One Pc. 12V/17Ah Rechargeable Sealed Lead-Acid Battery.
Operation: Temp.: 32 to 86°F/ 0°C to 30°C
DC 12V Output: D.C. 12V/10A protect with 15A CIRCUIT BREAKER. Negative Ground.
DC 5V USB Output: DC 5V USB Output
Weight: 20 lbs. / 9.1 kg. (Approx.)
Dimension: 355 H x 345 W x 132 D / 13.9” x 13.6” x 5.2” (Approx.)
NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this
equipment. Such modifications could void the user’s authority to operate the equipment.
©2022 Celestron. Celestron and Symbol are trademarks of Celestron, LLC.
All rights reserved. Celestron.com • 2835 Columbia Street, Torrance, CA 90503 USA
(Products or instructions may change without notice or obligation.)
Designed and intended for those 14 years of age and older.
Made in China 12-22

1. RECHARGE
IMPORTANT
+
Make sure that your battery charger is set to the
proper voltage setting before recharging. (FIG. 1 & 2)
+
Charge your PowerTank before using the first time.
+
Always make sure the switch is “OFF” when not in use.
+
Never attempt to use the battery charger provided for
other products.
+
If yellow LED light is on during operation, battery is
weak and should be recharged. (FIG. 5 & 7)
+
It is not recommend to use continuously when yellow
LED light is ON, do not use in this condition and
recharge immediately.
+
Do not exceed recommended charging times.
Explosion hazard exists if you do not follow this
instruction sheet.
+
Do not expose to extreme heat, flame, rain or
moisture. (FIG. 3)
WARNING: Continuous use when the battery is low will damage the
battery and may affect the ability to recharge your power tank. Recharge
after every use, follow the instructions to recharge.
HOW TO RECHARGE
AC RECHARGING
+
Select the suitable adapter plug for the AC adapter
(FIG. 6). Make sure that the plug is completely
locked in the adapter and snaps into place.
+
Push the main switch to the “CHA” position (FIG. 4)
and insert the small end of the included AC adapter
into the charge input jack located on the SIDE
PANEL of PowerTank.
+
Plug the charger into an appropriate electrical outlet.
(FIG. 1 & 2). The RED recharging light should come
“ON” indicating the battery is recharging. (FIG. 7)
+
Charge the battery for 15 to 20 hours before
initial use or long period of storage. After the initial
charge, subsequent charges will only be 10 to 12
hours (approx). If the unit is used too long after the
yellow light comes on, recharging could take up to
20 hours.
DC RECHARGING
+
The DC recharging adapter is located in the
compartment on the back side of the PowerTank.
+
Push the power switch to the “CHA” position (FIG.
4) and insert the provided “DC POWER CORD” into
the charge input jack located on the SIDE PANEL
of PowerTank. (FIG. 7)
+
Insert the other end into the cigarette lighter and
rotate to receive a good electrical contact. (FIG.
9) The red light should come “ON” indicating the
battery is recharging. (FIG. 7) Use DC 12V negative
ground system only.
+
The PowerTank should be charged for 10 to 12
hours (The charging rate will be 14.5 volts to 15.5
volts) while driving before initial use or long period
of storage. After the initial charge, subsequent
charges will last only 6 to 8 hours (approx).
NOTE: Charging the battery while the car engine is not running
is not recommended as it drains the car battery. Engine must be
running and the charging system functioning properly in order to
initiate a charge. The ideal charging rate is 14.5 volts to 15.5 volts,
nearly identical to the charging system in most vehicles. If the unit is
used too long after the yellow light comes ON, recharging can take
up to 8 hours.
WARNING: Don’t plug in the cigarette light plug and charge
the unit without starting the engine. This may destroy your vehicle’s
battery.Always recharge in an open area, otherwise explosive gas may
generate during overcharging.
2.STORAGE
+
High Temperature above 40°C should be avoided.
+
It is important to store the PowerTank in a clean,
cool and dry place. Radiant heat such as sunshine,
heating units, radiators or steam pipes will shorten
the life of the PowerTank.
+
For longest life, PowerTank should be fully charged
before going into storage. The PowerTank stored at
10°C or lower should be recharged at least once per
six months. The PowerTank stored at 10°C TO 27°C
should be charged every 3 months and recharging
should occur every 45 days in temperature from
27°C TO 40°C. The storage battery discharges
automatically when the Power Tank is not used for
a long time.
+
Make sure the PowerTank IS “OFF” before going
into storage.
F.5
F.6
F.7
F.8
F.9
F.4
F.2F.1
F.3
3.OPERATION
POWER SUPPLY
+
Make sure your devices match the PowerTank’s
rating - 10Amp for DC 12V & 1.5 Amp for DC 5V
USB (FIG.11, 12)
+
Connect your device to the appropriate output
receptacle.
+
Switch “ON” the PowerTank before turning ON your
device. (FIG.10)
FLASHLIGHT
+
Switch “ON” the PowerTank. (FIG.10)
+
Press Flashlight “ON/OFF” button to operate
“ON - FLASH - OFF”. (FIG.13)
+
Flashlight can be detached for remote operation,
screw clockwise and pull out to detach. To reinstall,
use the lever behind the lid on the back of the
flashlight to recoil the cord then push the flashlight
back in and turn counter-clockwise.
POWERFUL SPOTLIGHT
+
Adjust the spotlight head to desired direction.
(FIG.16)
+
Switch ON the PowerTank. (FIG.10)
+
Switch ON the spotlight. (FIG.13)
RADIO
+
Switch “ON” the PowerTank. (FIG. 10)
+
Turn the volume knob clockwise to turn “ON” the
radio.
+
Select AM or FM. (FIG.15)
+
Adjust the frequency and volume as desired. (FIG.15)
EMERGENCY SIREN
+
Switch “ON” the PowerTank. (FIG. 10)
+
Turn the FM / AM / SIREN selector to SIREN
position. (FIG.15)
WARNING: Do not overload the power tank, DC 12V/10A, DC3,
6, 9V/ 1A. The glass, reflector cup and the bulb is extremely hot when
operating. Do not touch! Do not use to jump start from DC 12V output
jack. Short circut or curcuit breaker cut off will result.
4. REPLACEMENT
FLASHLIGHT BULB
+
Make sure to switch “OFF” the PowerTank and
flashlight. (FIG. 17)
+
Make sure the light has COOLED DOWN before
replacing the bulb.
+
Detach by screw clockwise and pull out.
+
Remove the light cap by screwing it counter
clockwise. (FIG. 18)
+
Screw the bulb counter-clockwise to take off and
replace with a new bulb.
+
Reassemble the light cap and reinstall to main body
by pushing in and screw counter-clockwise.
CIRCUIT BREAKER
Your PowerTank has a built-in circuit breaker to
ensure a safe operation.
If the output current goes over 12V, the circuit
breaker will cut off the power.
HOW TO RESET THE CIRCUIT BREAKER
+
Turn “OFF” the PowerTank.
+
Press the C
IRCUIT BREAKER Button to reset it.
(FIG. 19)
WARNING: Do not recharge when resetting the circuit breaker.
FUSE
If the 5V is overloaded the fuse will break. Just turn
“OFF” the Power Tank (FIG. 17). Open the fuse cap
(FIG. 20) and replace with a new 2 Amp Fuse.
F.10 F.11 F.12
F.13
F.15
F.14
F.16
F.17
F.18
F.20
F.19

1. RECHARGE
IMPORTANT
+
Make sure that your battery charger is set to the
proper voltage setting before recharging. (FIG. 1 & 2)
+
Charge your PowerTank before using the first time.
+
Always make sure the switch is “OFF” when not in use.
+
Never attempt to use the battery charger provided for
other products.
+
If yellow LED light is on during operation, battery is
weak and should be recharged. (FIG. 5 & 7)
+
It is not recommend to use continuously when yellow
LED light is ON, do not use in this condition and
recharge immediately.
+
Do not exceed recommended charging times.
Explosion hazard exists if you do not follow this
instruction sheet.
+
Do not expose to extreme heat, flame, rain or
moisture. (FIG. 3)
WARNING: Continuous use when the battery is low will damage the
battery and may affect the ability to recharge your power tank. Recharge
after every use, follow the instructions to recharge.
HOW TO RECHARGE
AC RECHARGING
+
Select the suitable adapter plug for the AC adapter
(FIG. 6). Make sure that the plug is completely
locked in the adapter and snaps into place.
+
Push the main switch to the “CHA” position (FIG. 4)
and insert the small end of the included AC adapter
into the charge input jack located on the SIDE
PANEL of PowerTank.
+
Plug the charger into an appropriate electrical outlet.
(FIG. 1 & 2). The RED recharging light should come
“ON” indicating the battery is recharging. (FIG. 7)
+
Charge the battery for 15 to 20 hours before
initial use or long period of storage. After the initial
charge, subsequent charges will only be 10 to 12
hours (approx). If the unit is used too long after the
yellow light comes on, recharging could take up to
20 hours.
DC RECHARGING
+
The DC recharging adapter is located in the
compartment on the back side of the PowerTank.
+
Push the power switch to the “CHA” position (FIG.
4) and insert the provided “DC POWER CORD” into
the charge input jack located on the SIDE PANEL
of PowerTank. (FIG. 7)
+
Insert the other end into the cigarette lighter and
rotate to receive a good electrical contact. (FIG.
9) The red light should come “ON” indicating the
battery is recharging. (FIG. 7) Use DC 12V negative
ground system only.
+
The PowerTank should be charged for 10 to 12
hours (The charging rate will be 14.5 volts to 15.5
volts) while driving before initial use or long period
of storage. After the initial charge, subsequent
charges will last only 6 to 8 hours (approx).
NOTE: Charging the battery while the car engine is not running
is not recommended as it drains the car battery. Engine must be
running and the charging system functioning properly in order to
initiate a charge. The ideal charging rate is 14.5 volts to 15.5 volts,
nearly identical to the charging system in most vehicles. If the unit is
used too long after the yellow light comes ON, recharging can take
up to 8 hours.
WARNING: Don’t plug in the cigarette light plug and charge
the unit without starting the engine. This may destroy your vehicle’s
battery.Always recharge in an open area, otherwise explosive gas may
generate during overcharging.
2.STORAGE
+
High Temperature above 40°C should be avoided.
+
It is important to store the PowerTank in a clean,
cool and dry place. Radiant heat such as sunshine,
heating units, radiators or steam pipes will shorten
the life of the PowerTank.
+
For longest life, PowerTank should be fully charged
before going into storage. The PowerTank stored at
10°C or lower should be recharged at least once per
six months. The PowerTank stored at 10°C TO 27°C
should be charged every 3 months and recharging
should occur every 45 days in temperature from
27°C TO 40°C. The storage battery discharges
automatically when the Power Tank is not used for
a long time.
+
Make sure the PowerTank IS “OFF” before going
into storage.
F.5
F.6
F.7
F.8
F.9
F.4
F.2F.1
F.3
3.OPERATION
POWER SUPPLY
+
Make sure your devices match the PowerTank’s
rating - 10Amp for DC 12V & 1.5 Amp for DC 5V
USB (FIG.11, 12)
+
Connect your device to the appropriate output
receptacle.
+
Switch “ON” the PowerTank before turning ON your
device. (FIG.10)
FLASHLIGHT
+
Switch “ON” the PowerTank. (FIG.10)
+
Press Flashlight “ON/OFF” button to operate
“ON - FLASH - OFF”. (FIG.13)
+
Flashlight can be detached for remote operation,
screw clockwise and pull out to detach. To reinstall,
use the lever behind the lid on the back of the
flashlight to recoil the cord then push the flashlight
back in and turn counter-clockwise.
POWERFUL SPOTLIGHT
+
Adjust the spotlight head to desired direction.
(FIG.16)
+
Switch ON the PowerTank. (FIG.10)
+
Switch ON the spotlight. (FIG.13)
RADIO
+
Switch “ON” the PowerTank. (FIG. 10)
+
Turn the volume knob clockwise to turn “ON” the
radio.
+
Select AM or FM. (FIG.15)
+
Adjust the frequency and volume as desired. (FIG.15)
EMERGENCY SIREN
+
Switch “ON” the PowerTank. (FIG. 10)
+
Turn the FM / AM / SIREN selector to SIREN
position. (FIG.15)
WARNING: Do not overload the power tank, DC 12V/10A, DC3,
6, 9V/ 1A. The glass, reflector cup and the bulb is extremely hot when
operating. Do not touch! Do not use to jump start from DC 12V output
jack. Short circut or curcuit breaker cut off will result.
4. REPLACEMENT
FLASHLIGHT BULB
+
Make sure to switch “OFF” the PowerTank and
flashlight. (FIG. 17)
+
Make sure the light has COOLED DOWN before
replacing the bulb.
+
Detach by screw clockwise and pull out.
+
Remove the light cap by screwing it counter
clockwise. (FIG. 18)
+
Screw the bulb counter-clockwise to take off and
replace with a new bulb.
+
Reassemble the light cap and reinstall to main body
by pushing in and screw counter-clockwise.
CIRCUIT BREAKER
Your PowerTank has a built-in circuit breaker to
ensure a safe operation.
If the output current goes over 12V, the circuit
breaker will cut off the power.
HOW TO RESET THE CIRCUIT BREAKER
+
Turn “OFF” the PowerTank.
+
Press the C
IRCUIT BREAKER Button to reset it.
(FIG. 19)
WARNING: Do not recharge when resetting the circuit breaker.
FUSE
If the 5V is overloaded the fuse will break. Just turn
“OFF” the Power Tank (FIG. 17). Open the fuse cap
(FIG. 20) and replace with a new 2 Amp Fuse.
F.10 F.11 F.12
F.13
F.15
F.14
F.16
F.17
F.18
F.20
F.19

POWER TANK
INSTRUCTION MANUAL
MODEL #18777
5. TO REMOVE BATTERY FOR DISPOSAL
This rechargeable power tank is powered by a sealed
lead-acid battery, one PC (12V 17 Ah/20 HR).
+
Make sure the PowerTank is in the “OFF” position
before removing battery. (FIG. 21)
+
Make sure the PowerTank is disconnected from the
charger which must be OFF from the electric supply.
(FIG. 23)
+
Remove the spotlight by loosening the screw.
+
Face the PowerTank down and open into 2 halves
by unscrewing screws counterclockwise. (FIG. 22)
+
Cut wires to remove battery.
CAUTION: There may be electric shock.
F.21
6. TROUBLESHOOTING
PROBLEM POSSIBLE SOLUTION
1. No LED indicator (low or charge) when
switch in “on” position
Circuit breaker cut off circuit Reset the circuit breaker according
to the instruction
2. No LED indicator (full or charge) when
recharging
Circuit breaker cut off circuit Reset the circuit breaker according
to the instruction
3. DC-12V output doesn’t work when
switch in “on” position
Circuit breaker cut off circuit Reset the circuit breaker according
to the instruction
4. USB output doesn’t work when switch
in “on” position
Fuse was broken Replace the fuse according to the
instruction
7. STARTING AID FOR MOTOR VEHICLES
+
The jumper cable terminals are located at the back
of unit under a black hinged cover
+
Use only jumper cables of sufficient gauge
(cross section)
+
The PowerTank can only be
used as a starting aid when the
vehicle’s battery is only partially
discharged. Thus, only a limited
capacity can be transferred
into the vehicle’s battery.
HOW TO USE THE POWERTANK TO START A VEHICLE:
+
The ON/OFF switch can be set to”ON” or “OFF”
position for the starting aid function.
+
Connect the POSITIVE pole (+) of the PowerTank
to the POSITIVE pole (+) of the vehicle battery.
+
Connect the NEGATIVE pole (-) of the PowerTank
to the NEGATIVE pole (-) of the vehicle battery.
+
Leave the PowerTank connected to the vehicle
battery for around 20 minutes.
+
After approximately 20 minutes, disconnect the
jumper cable from the NEGATIVE pole (-) of the
vehicle battery.
+
Then disconnect the jumper cable from the
POSITIVE pole (+) of the vehicle battery.
+
This partial charge should be sufficient to start
the vehicle.
+
The PowerTank needs to be recharged after
using as a starting aid.
WARNING:The Fuse and Switch is no function on the connect
( + ) ( - ) pole, current flows directly from the battery. Once the jumper
cables are connected, NEVER allow the cables to touch together or
be left on the same metal surface, this will result in short circuit and
may start a fire. NEVER ATTEMPT TO START THE VEHICLE WITH THE
POWER TANK CONNECTED.
8. SPECIFICATION
Batteries: One Pc. 12V/17Ah Rechargeable Sealed Lead-Acid Battery.
Operation: Temp.: 32 to 86°F/ 0°C to 30°C
DC 12V Output: D.C. 12V/10A protect with 15A CIRCUIT BREAKER. Negative Ground.
DC 5V USB Output: DC 5V USB Output
Weight: 20 lbs. / 9.1 kg. (Approx.)
Dimension: 355 H x 345 W x 132 D / 13.9” x 13.6” x 5.2” (Approx.)
NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this
equipment. Such modifications could void the user’s authority to operate the equipment.
©2022 Celestron. Celestron and Symbol are trademarks of Celestron, LLC.
All rights reserved. Celestron.com • 2835 Columbia Street, Torrance, CA 90503 USA
(Products or instructions may change without notice or obligation.)
Designed and intended for those 14 years of age and older.
Made in China 12-22
