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59424
2/5/10/50 AMP
12V ANALOG BATTERY CHARGER
WITH ENGINE STARTER
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual (or month and year of purchase if product has no number). Keep this manual and the
receipt in a safe and dry place for future reference. 23l
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright
©
2021 by Harbor Freight Tools
®
. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Page 2 For technical questions, please call 1-888-866-5797. 59424
SaFety OperatiOn MaintenanceSpeciFicatiOnS
table of contents
Safety ......................................................... 2
Specifications ............................................. 6
Operation .................................................... 6
Maintenance .............................................. 11
Warranty .................................................... 12
WarninG SyMBOLS anD DeFinitiOnS
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that
follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
Vac
Volts Alternating Current
a
Amperes
cca
Cold Cranking Amps
rc
Reserve Capacity
ah
Ampere-hours
WARNING marking
concerning Risk of Eye Injury.
Wear ANSI-approved
splash-resistant safety goggles.
Read the manual before
set-up and/or use.
WARNING marking
concerning Risk of Fire.
Follow connection procedure.
Page 3For technical questions, please call 1-888-866-5797.59424
SaFetyOperatiOnMaintenance SpeciFicatiOnS
iMpOrtant SaFety inStrUctiOnS
1. SaVe tHeSe inStrUctiOnS –
This manual contains important safety and
operating instructions for this battery charger.
2. Do not expose charger to rain or snow.
3. Use of an attachment not recommended or sold
by the battery charger manufacturer may result in
a risk of fire, electric shock, or injury to persons.
4. To reduce risk of damage to electric
plug and cord, pull by plug rather than
cord when disconnecting charger.
5. An extension cord should not be used unless
absolutely necessary. Use of improper extension
cord could result in a risk of fire and electric shock.
If an extension cord must be used, make sure:
a. That pins on plug of extension cord
are the same number, size, and shape
as those of plug on charger;
b. That extension cord is properly wired
and in good electrical condition; and
c. That wire size is large enough for AC ampere
rating of charger as specified in Table A.
table a: recommended minimum aWG size
for extension cords for battery chargers
ac input rating, amperes*
aWG size of cord
Length of cord, feet
equal to or
greater than
But less
than
25 50 100 150
0 2 18 18 18 16
2 3 18 18 16 14
3 4 18 18 16 14
4 5 18 18 14 12
5 6 18 16 14 12
6 8 18 16 12 10
8 10 18 14 12 10
10 12 16 14 10 8
12 14 16 12 10 8
14 16 16 12 10 8
16 18 14 12 8 8
18 20 14 12 8 6
* If the input rating of a charger is given in watts rather than in
amperes, the corresponding ampere rating is to be determined by
dividing the wattage rating by the voltage rating – for example:
1250 watts/125 volts = 10 amperes
6. Do not operate charger with damaged cord or plug
– replace the cord or plug immediately.
7. Do not operate charger if it has received a sharp
blow, been dropped, or otherwise damaged in
any way; take it to a qualified serviceman.
8. Do not disassemble charger; take it to a
qualified serviceman when service or repair
is required. Incorrect reassembly may
result in a risk of electric shock or fire.
9. To reduce risk of electric shock, unplug charger
from outlet before attempting any maintenance or
cleaning. Turning off controls will not reduce this risk.
10. WARNING – RISK OF EXPLOSIVE GASES.
a. WORKING IN VICINITY OF A LEAD-ACID
BATTERY IS DANGEROUS. BATTERIES
GENERATE EXPLOSIVE GASES DURING
NORMAL BATTERY OPERATION. FOR THIS
REASON, IT IS OF UTMOST IMPORTANCE
THAT YOU FOLLOW THE INSTRUCTIONS
EACH TIME YOU USE THE CHARGER.
b. To reduce risk of battery explosion, follow
these instructions and those published by
battery manufacturer and manufacturer of
any equipment you intend to use in vicinity
of battery. Review cautionary marking
on these products and on engine.
11. PERSONAL PRECAUTIONS
a. Consider having someone close
enough by to come to your aid when
you work near a lead-acid battery.
b. Have plenty of fresh water and soap nearby in
case battery acid contacts skin, clothing, or eyes.
c. Wear complete eye protection and
clothing protection. Avoid touching
eyes while working near battery.
d. If battery acid contacts skin or clothing,
wash immediately with soap and water.
If acid enters eye, immediately flood eye with
running cold water for at least 10 minutes
and get medical attention immediately.
e. NEVER smoke or allow a spark or flame
in vicinity of battery or engine.
f. Be extra cautious to reduce risk of dropping
a metal tool onto battery. It might spark
or short-circuit battery or other electrical
part that may cause explosion.
g. Remove personal metal items such as rings,
bracelets, necklaces, and watches when
working with a lead-acid battery. A lead-
acid battery can produce a short-circuit
current high enough to weld a ring or the
like to metal, causing a severe burn.
Page 4 For technical questions, please call 1-888-866-5797. 59424
SaFety OperatiOn MaintenanceSpeciFicatiOnS
h. Use charger for charging a LEAD-ACID battery
only. It is not intended to supply power to a
low voltage electrical system other than in a
starter-motor application. Do not use battery
charger for charging dry-cell batteries that
are commonly used with home appliances.
These batteries may burst and cause injury
to persons and damage to property.
i. NEVER charge a frozen battery.
12. PREPARING TO CHARGE
a. If necessary to remove battery from vehicle
to charge, always remove grounded terminal
from battery first. Make sure all accessories in
the vehicle are off, so as not to cause an arc.
b. Be sure area around battery is well
ventilated while battery is being charged.
c. Clean battery terminals. Be careful to keep
corrosion from coming in contact with eyes.
d. Add distilled water in each cell until battery
acid reaches level specified by battery
manufacturer. Do not overfill. For a battery
without removable cell caps, such as valve
regulated lead acid batteries, carefully follow
manufacturer’s recharging instructions.
e. Study all battery manufacturer’s
specific precautions while charging and
recommended rates of charge.
f. Determine voltage of battery by referring
to vehicle owner’s manual and make sure
it matches output rating of battery charger.
If charger has adjustable charge rate,
charge battery initially at lowest rate.
13. CHARGER LOCATION
a. Locate charger as far away from
battery as DC cables permit.
b. Never place charger directly above
battery being charged; gases from battery
will corrode and damage charger.
c. Never allow battery acid to drip on
charger when reading electrolyte
specific gravity or filling battery.
d. Do not operate charger in a closed-in
area or restrict ventilation in any way.
e. Do not set a battery on top of charger.
14. DC CONNECTION PRECAUTIONS
a. Connect and disconnect DC output clips only
after setting any charger switches to “off” position
and removing AC cord from electric outlet.
Never allow clips to touch each other.
b. Attach clips to battery and chassis as indicated
in 15(e), 15(f), and 16(b) through 16(d).
15. FOLLOW THESE STEPS WHEN BATTERY
IS INSTALLED IN VEHICLE. A SPARK NEAR
BATTERY MAY CAUSE BATTERY EXPLOSION.
TO REDUCE RISK OF A SPARK NEAR BATTERY:
a. Position AC and DC cables to reduce risk of
damage by hood, door, or moving engine part.
b. Stay clear of fan blades, belts, pulleys, and
other parts that can cause injury to persons.
c. Check polarity of battery posts. POSITIVE
(POS, P, +) battery post usually has larger
diameter than NEGATIVE (NEG, N,–) post.
d. Determine which post of battery is
grounded (connected) to the chassis. If
negative post is grounded to chassis (as
in most vehicles), see (e). If positive post
is grounded to the chassis, see (f).
e. For negative-grounded vehicle, connect
POSITIVE (RED) clip from battery charger
to POSITIVE (POS, P, +) ungrounded post
of battery. Connect NEGATIVE (BLACK)
clip to vehicle chassis or engine block
away from battery. Do not connect clip to
carburetor, fuel lines, or sheet-metal body
parts. Connect to a heavy gauge metal
part of the frame or engine block.
f. For positive-grounded vehicle, connect
NEGATIVE (BLACK) clip from battery charger
to NEGATIVE (NEG, N, –) ungrounded post of
battery. Connect POSITIVE (RED) clip to vehicle
chassis or engine block away from battery.
Do not connect clip to carburetor, fuel lines, or
sheet-metal body parts. Connect to a heavy
gauge metal part of the frame or engine block.
g. When disconnecting charger, turn
switches to off, disconnect AC cord,
remove clip from vehicle chassis, and
then remove clip from battery terminal.
h. See operating instructions for
length of charge information.
16. FOLLOW THESE STEPS WHEN BATTERY
IS OUTSIDE VEHICLE. A SPARK NEAR THE
BATTERY MAY CAUSE BATTERY EXPLOSION.
TO REDUCE RISK OF A SPARK NEAR BATTERY:
a. Check polarity of battery posts. POSITIVE
(POS, P, +) battery post usually has a larger
diameter than NEGATIVE (NEG, N, –) post.
b. Attach at least a 24-inch-long 6-gauge
(AWG) insulated battery cable to
NEGATIVE (NEG, N, –) battery post.
c. Connect POSITIVE (RED) charger clip to
POSITIVE (POS, P, +) post of battery.
d. Position yourself and free end of cable
as far away from battery as possible
– then connect NEGATIVE (BLACK)
charger clip to free end of cable.
e. Do not face battery when
making final connection.
Page 5For technical questions, please call 1-888-866-5797.59424
SaFetyOperatiOnMaintenance SpeciFicatiOnS
f. When disconnecting charger,
always do so in reverse sequence of connecting
procedure and break first connection while
as far away from battery as practical.
g. A marine (boat) battery must be removed and
charged on shore. To charge it on board requires
equipment specially designed for marine use.
17. Wear ANSI-approved splash-resistant
safety goggles and heavy-duty rubber
work gloves whenever connecting,
disconnecting, or working near battery.
Battery acid can cause
permanent blindness.
18. Do not use Start setting to charge
batteries. Use to jump start only.
19. Maintain labels and nameplates on the charger.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
20. This product is not a toy.
Keep it out of reach of children.
21. Unplug the Battery Charger from its
electrical outlet before connecting its cables
to a battery, or performing any inspection,
maintenance, or cleaning procedures.
22. although this charger has an automatic cut off,
do nOt depend solely on automatic cut off.
Leaving charger unattended can result
in fire and property damage.
23. Use this charger with flooded lead-acid or
aGM batteries only.
When charging a maintenance-free battery,
always monitor the progress of
the charge by viewing the Charge Meter.
Do not overcharge a maintenance-free battery.
DO nOt USe WitH GeL BatterieS.
24. Do not attempt to charge non-rechargeable
or defective batteries.
25. Do not charge more than one battery at one time.
26. Have your charger serviced by a qualified repair
person using only identical replacement parts.
This will ensure that the safety of
the charger is maintained.
27. Do not use charger while you are tired or under
the influence of drugs, alcohol or medication.
A moment of inattention while operating charger
may result in serious personal injury.
28. Before moving charger, disconnect power supply
and battery, then allow charger to cool.
29. People with pacemakers should consult their
physician(s) before use. Electromagnetic fields in
close proximity to heart pacemaker could cause
pacemaker interference or pacemaker failure.
In addition, people with pacemakers should:
• Avoid operating alone.
• Properly maintain and inspect
to avoid electrical shock.
• Properly ground power cord. Ground Fault Circuit
Interrupter (GFCI) should also be implemented
– it prevents sustained electrical shock.
30. The warnings, precautions, and instructions
discussed in this instruction manual cannot
cover all possible conditions and situations
that may occur. It must be understood by the
operator that common sense and caution are
factors which cannot be built into this product,
but must be supplied by the operator.
SaVe tHeSe inStrUctiOnS.
Page 6 For technical questions, please call 1-888-866-5797. 59424
SaFety OperatiOn MaintenanceSpeciFicatiOnS
Specifications
Input 120VAC, 60Hz, 2A, 9A (Start)
Output 12VDC, 2A/10A
Engine Start 50A, On times: 5s, Off time: 180s
Minimum Operating
Voltage
Greater than 6.8V
*amperage is only present when the unit is
connected to a battery or in Start mode.
Operation instructions
read the entire iMpOrtant SaFety inFOrMatiOn section at the beginning of this
manual including all text under subheadings therein before set up or use of this product.
tO preVent SeriOUS inJUry:
DO nOt pLUG in cHarGer UntiL DirecteD tO DO SO.
controls
Setting
Switch
Battery
type
Switch
amps Gauge
charge
Status
reversed
polarity
reversed polarity:
The cables are connected improperly.
Immediately disconnect the cables and connect
them properly to prevent damage to the battery.
charge Status:
• red Light - The battery is bad or wrong
battery voltage is detected.
• Green Light - The battery is charging/fully charged.
* charging: Green Light is on, Amps
Gauge Needle shows amps output.
* Fully charged: Green Light is on, Amps
Gauge Needle shows 0A Position.
note: This is disabled in start mode.
Setting switch:
Use the Setting Switch to change the output
amperage between 2/5A, 10A, & 50A, and
to select charging and start modes.
Battery type switch:
Use this switch to set the battery type:
• Set to Regular for flooded and
maintenance-free batteries.
• Set to AGM for Absorbed Glass Mat batteries.
• Set to AC Off to switch off power.
WarninG! tO preVent SeriOUS inJUry: tO
preVent eXpLOSiOn:
DO nOt USe WitH GeL BatterieS.
note: The Amps Gauge shows the amount of current being drawn from the charger. It does not show
what the charger is capable of delivering. The current drawn is limited as the battery voltage reaches
full charged level. When the battery is fully charged and the Amps Gauge needle settles at 0A, a small
current will continue to trickle to the battery. If the charger is not disconnected from the battery, eventually
heat build up will cause the battery acid to boil and overcharge the battery causing damage to the battery.
Monitor battery charging progress constantly and if battery gets warm, stop charging it immediately.
Page 7For technical questions, please call 1-888-866-5797.59424
SaFetyOperatiOnMaintenance SpeciFicatiOnS
preparing to charge
Use this charger only on flooded or aGM lead-acid batteries.
Other batteries may be damaged or may overheat, leak, or catch fire.
tO preVent SeriOUS inJUry:
Wear anSi-approved splash-resistant safety goggles and heavy-duty rubber work gloves
whenever connecting, disconnecting, or working near battery.
Battery acid can cause permanent blindness.
1. If necessary to remove battery from vehicle to
charge, always remove grounded terminal from
battery first. Make sure all accessories in the
vehicle are off, so as not to cause an arc.
2. Make sure area around battery is well
ventilated while battery is being charged.
3. Clean battery terminals. Be careful to keep
corrosion from coming in contact with eyes.
4. Add distilled water in each cell until battery acid
reaches level specified by battery manufacturer.
Do not overfill. For a battery without
removable cell caps, such as valve
regulated lead acid batteries, carefully follow
manufacturer’s recharging instructions.
5. Study all battery manufacturer’s specific precautions
while charging and recommended rates of charge.
6. Determine voltage of battery by referring to vehicle
owner’s manual and make sure it matches output
rating of battery charger. If charger has adjustable
charge rate, charge battery initially at lowest rate.
7. A marine (boat) battery must be removed and
charged on shore. To charge it on board requires
equipment specially designed for marine use.
SHOrteD/ DeepLy SULFateD BatterieS - will
read on Charge Meter as a high end peg at beginning
of charging process. If after 5-10 minutes, needle
does not move off high end, the battery probably has
a short circuit. Unplug charger and discontinue use.
Have battery checked by a qualified technician.
DeaD BatterieS - battery voltage must be greater
than 6.8V before connecting charger to operate.
cOLD BatterieS - begin charging at a low rate,
increase as battery reaches a normal temperature,
then rate will decrease normally.
DO nOt cHarGe a FrOZen Battery.
BatterieS WitH HyDrOMeter eye:
Do not depend on hydrometer eye to
determine battery charge level.
Grounding and ac power cord connection instructions
Charger should be grounded to reduce risk of electric
shock. Charger is equipped with an electric cord
having an equipment-grounding conductor and a
grounding plug. The plug must be plugged into an
outlet that is properly installed and grounded in
accordance with all local codes and ordinances.
DanGer – Never alter AC cord or plug provided
– if it will not fit outlet, have proper outlet installed
by a qualified electrician. Improper connection
can result in a risk of an electric shock.
caUtiOn – risk of Fire or electric Shock.
Connect battery charger directly to grounding
receptacle (three-prong). An adapter should
not be used with battery charger.
charger Location
1. Locate charger as far away from
battery as DC cables permit.
2. Never place charger directly above
battery being charged; gases from battery
will corrode and damage charger.
3. Never allow battery acid to drip on charger when
reading electrolyte specific gravity or filling battery.
4. Do not operate charger in a closed-in
area or restrict ventilation in any way.
5. Do not set a battery on top of charger.
Page 8 For technical questions, please call 1-888-866-5797. 59424
SaFety OperatiOn MaintenanceSpeciFicatiOnS
charging Battery installed in Vehicle
a SparK near Battery May caUSe Battery eXpLOSiOn.
tO reDUce riSK OF a SparK near Battery FOLLOW tHeSe inStrUctiOnS eXactLy.
tO preVent SeriOUS inJUry:
Wear anSi-approved splash-resistant safety goggles and heavy-duty rubber work gloves
whenever connecting, disconnecting, or working near battery.
Battery acid can cause permanent blindness.
caUtiOn! Do not use Start setting to
charge batteries. Use to jump start only.
1. Position AC and DC cables to reduce risk of
damage by hood, door, or moving engine part.
2. Stay clear of fan blades, belts, pulleys, and
other parts that can cause injury to persons.
3. Check polarity of battery posts. POSITIVE
(POS, P, +) battery post usually has larger
diameter than NEGATIVE (NEG, N,–) post.
4. Determine which post of battery is grounded
(connected) to the chassis. If negative post is
grounded to chassis (as in most vehicles), see 5.
If positive post is grounded to the chassis, see 6.
5. For negative-grounded vehicle, connect
POSITIVE (RED) clip from battery charger to
POSITIVE (POS, P, +) ungrounded post of battery.
Connect NEGATIVE (BLACK) clip to vehicle
chassis or engine block away from battery.
Do not connect clip to carburetor, fuel lines, or
sheet-metal body parts. Connect to a heavy
gauge metal part of the frame or engine block.
nOtice: if the reversed polarity indicator lights,
the cables are connected improperly.
immediately disconnect the cables and connect
them properly to prevent damage to the battery.
6. For positive-grounded vehicle, connect
NEGATIVE (BLACK) clip from battery charger
to NEGATIVE (NEG, N, –) ungrounded post of
battery. Connect POSITIVE (RED) clip to vehicle
chassis or engine block away from battery.
Do not connect clip to carburetor, fuel lines, or
sheet-metal body parts. Connect to a heavy
gauge metal part of the frame or engine block.
note: If the charger cycles between maximum charge
level and a lower charge level when first connected,
then the battery may be fully charged or nearly fully
charged. Further charging may not be needed.
If charging is attempted, charge at a lower rate and
carefully monitor charge level to avoid battery damage.
7. Set Battery Type switch according to battery type:
• Set to Regular for flooded and
maintenance-free batteries.
• Set to AGM for Absorbed Glass Mat batteries.
WarninG! tO preVent SeriOUS inJUry: tO
preVent eXpLOSiOn:
DO nOt USe WitH GeL BatterieS.
8. Set Setting switch to 2A Trickle Charge
or 10A Quick Charge.
caUtiOn! Do not use 50a emergency engine Start
function for charging.
9. After switches are set, plug in charger.
10. Monitor the charging process. The Charged
LED indicator will light up solid green and the
needle on the Amps Gauge settles at the 0A
position when the battery is fully charged.
11. When disconnecting charger, turn switches to
off, disconnect AC cord, remove clip from vehicle
chassis, and then remove clip from battery terminal.
12. After use clean, then store the charger
indoors out of children’s reach.
Page 9For technical questions, please call 1-888-866-5797.59424
SaFetyOperatiOnMaintenance SpeciFicatiOnS
charging Battery Outside Vehicle
a SparK near Battery May caUSe Battery eXpLOSiOn.
tO reDUce riSK OF a SparK near Battery FOLLOW tHeSe inStrUctiOnS eXactLy.
tO preVent SeriOUS inJUry:
Wear anSi-approved splash-resistant safety goggles and heavy-duty rubber work gloves
whenever connecting, disconnecting, or working near battery.
Battery acid can cause permanent blindness.
caUtiOn! Do not use Start setting to
charge batteries. Use to jump start only.
1. Check polarity of battery posts. POSITIVE
(POS, P, +) battery post usually has a larger
diameter than NEGATIVE (NEG, N, –) post.
2. Attach at least a 24-inch-long 6-gauge
(AWG) insulated battery cable to
NEGATIVE (NEG, N, –) battery post.
3. Connect POSITIVE (RED) charger clip to
POSITIVE (POS, P, +) post of battery.
4. Position yourself and free end of cable as far away
from battery as possible – then connect NEGATIVE
(BLACK) charger clip to free end of cable.
5. Do not face battery when making final connection.
nOtice: if the reversed polarity indicator lights,
the cables are connected improperly.
immediately disconnect the cables and connect
them properly to prevent damage to the battery.
6. Set Battery Type switch according to battery type:
• Set to Regular for flooded and
maintenance-free batteries.
• Set to AGM for Absorbed Glass Mat batteries.
WarninG! tO preVent SeriOUS inJUry: tO
preVent eXpLOSiOn:
DO nOt USe WitH GeL BatterieS.
7. Set Setting switch to 2A Trickle Charge
or 10A Quick Charge.
caUtiOn! Do not use 50a emergency engine Start
function for charging.
8. After switches are set, plug in charger.
9. Monitor the charging process. The Charged
LED indicator will light up solid green and the
needle on the Amps Gauge settles at the 0A
position when the battery is fully charged.
10. When disconnecting charger, always do
so in reverse sequence of connecting
procedure and break first connection while
as far away from battery as practical.
11. After use clean, then store the charger
indoors out of children’s reach.
Page 10 For technical questions, please call 1-888-866-5797. 59424
SaFety OperatiOn MaintenanceSpeciFicatiOnS
12V engine Starting
Some vehicles with onboard computers may be damaged from the high-current starting output.
thoroughly read the vehicle service manual before using this procedure.
note: During extremely cold weather or when battery
is severely exhausted, charge the battery for about
five minutes before attempting to turn on engine.
caUtiOn! Do not use Start setting to
charge batteries. Use to jump start only.
1. Unplug the Charger AC power
cord from the AC outlet.
2. For negative-grounded vehicle, connect
POSITIVE (RED) clip from battery charger to
POSITIVE (POS, P, +) ungrounded post of battery.
Connect NEGATIVE (BLACK) clip to vehicle
chassis or engine block away from battery.
Do not connect clip to carburetor, fuel lines, or
sheet-metal body parts. Connect to a heavy gauge
metal part of the frame or engine block.
nOtice: if the reverse polarity indicator lights,
the cables are connected improperly.
immediately disconnect the cables and connect
them properly to prevent damage to the battery.
3. Position AC and DC cables to reduce risk of
damage by hood, door, or moving engine part.
4. Set Battery Type switch according to battery type:
• Set to Regular for flooded and
maintenance-free batteries.
• Set to AGM for Absorbed Glass Mat batteries.
WarninG! tO preVent SeriOUS inJUry: tO
preVent eXpLOSiOn:
DO nOt USe WitH GeL BatterieS.
5. Set Setting switch to 50A Emergency Engine Start.
6. After switches are set, plug in charger.
7. WarninG! tO preVent SeriOUS
inJUry, Fire, anD DaMaGe tO
cHarGer anD Battery, follow 5 second
maximum with 4 minute minimum rest
duty cycle for the Start mode.
8. To start the engine, turn ignition key.
OnLy Keep cHarGer in Start MODe
Up tO 5 SecOnDS at a tiMe.
9. If engine fails to start, charge battery for an
additional five minutes before attempting to start.
10. After the engine starts, unplug the power cord from
outlet before disconnecting the DC cable clamps.
Page 11For technical questions, please call 1-888-866-5797.59424
SaFetyOperatiOnMaintenance SpeciFicatiOnS
Maintenance instructions
procedures not specifically explained in this manual must
be performed only by a qualified technician.
tO preVent SeriOUS inJUry: Unplug the charger, disconnect any battery, and allow charger
to cool completely before performing any inspection, maintenance, or cleaning procedures.
tO preVent SeriOUS inJUry FrOM cHarGer FaiLUre:
Do not use damaged equipment. if abnormal noise or vibration occurs,
have the problem corrected before further use.
1. BeFOre eacH USe, inspect the general
condition of the charger. Check for:
• loose hardware,
• cracked or broken parts,
• damaged electrical wiring or cable insulation, and
• any other condition that may
affect its safe operation.
2. aFter USe, wipe external surfaces
of the charger with clean cloth.
3. WarninG! tO preVent SeriOUS
inJUry: if the supply cord of this charger
is damaged, it must be replaced only by
a qualified service technician. DO nOt
Open cHarGer HOUSinG, nO USer-
SerViceaBLe partS inSiDe.
troubleshooting
problem possible causes Likely Solutions
Charger will not start. 1. Cord not connected.
2. No power at outlet.
3. Clamps are not securely
connected to battery terminals
4. AC OFF switch is left
at OFF position.
5. Battery is deeply sulfated
or voltage is below 6.8V.
1. Check that cord is plugged in.
2. Check power at outlet.
If outlet is unpowered, turn off charger and
check circuit breaker.
If breaker is tripped,
make sure circuit is right capacity for
charger and circuit has no other loads.
3. Unplug charger and check that the clamps are
securely connected to the battery terminals.
4. Turn AC OFF switch to battery
type that is being charged.
5. Boost battery above 6.8V or replace.
Red Reversed Polarity
LED turns on.
Clamps are attached to
wrong battery terminals.
Unplug charger if it is plugged in
and reverse the connections.
Charge Meter stays at
high end of dial for more
than 5-10 minutes.
Battery has a short circuit. Unplug the charger and discontinue
use. Have the battery checked
by a qualified technician.
Charger will not
start vehicle.
1. Setting switch is set to Charge.
2. Vehicle needs more
than 50A to start.
1. Change the Setting switch to Start.
2. Use jump starter or different charger
with higher starting amps.
Follow all safety precautions whenever diagnosing or servicing the charger.
Disconnect power supply before service.
record product’s Serial number Here:
note: If product has no serial number, record month and year of purchase instead.
note: Internal parts are not user-serviceable. Replacement parts are not available. Reference UPC 193175470065.
26677 agoura road • calabasas, ca 91302 • 1-888-866-5797
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
