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57015
6V/12V 2 AMP, 3-STAGE
MICROPROCESSOR CONTROLLED
AUTOMATIC BATTERY CHARGER
tM
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. 25a
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-800-444-3353 as soon as possible.
Copyright
©
2024 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 1-800-444-3353. 57015
SaFety OperatiOn MaintenanceaSSeMbly
table of contents
Safety ......................................................... 3
Specifications ............................................. 6
Operation .................................................... 9
Maintenance .............................................. 10
Warranty .................................................... 12
tM
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.
V
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 1-800-444-3353.57015
SaFetyOperatiOnMaintenance aSSeMbly
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 1-800-444-3353. 57015
SaFety OperatiOn MaintenanceaSSeMbly
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 1-800-444-3353.57015
SaFetyOperatiOnMaintenance aSSeMbly
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. Maintain labels and nameplates on the charger.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
19. This product is not a toy.
Keep it out of reach of children.
20. Unplug the Battery Charger from its
electrical outlet before connecting its cables
to a battery, or performing any inspection,
maintenance, or cleaning procedures.
21. Use this charger with flooded lead-acid
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.
22. Do not attempt to charge non-rechargeable
or defective batteries.
23. Do not charge more than one battery at one time.
24. 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.
25. 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.
26. Before moving charger, disconnect power
supply and battery, then allow charger to cool.
27. 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.
28. 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.
Fcc Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.Specifications
Page 6 For technical questions, please call 1-800-444-3353. 57015
SaFety OperatiOn MaintenanceaSSeMbly
Specifications
Electrical Input 120VAC, 50/60Hz, 30W Max
Electrical Output 6VDC / 12VDC, 2 A
Battery Cables
6', 18 AWG
Red = Positive
Black = Negative
Operating 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:
assemble charger according to assembly instructions before use.
DO nOt plUG in cHarGer Until DirecteD tO DO SO.
controls
Mode
button
Voltage
leDs
charging
indicator
leDs
Fault
leD
Standby
leD
Page 7For technical questions, please call 1-800-444-3353.57015
SaFetyOperatiOnMaintenance aSSeMbly
preparing to charge
Use this charger only on flooded 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.
nOtice: nOt recOMMenDeD FOr Deep cycle Marine batterieS.
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.
DO nOt cHarGe a FrOZen battery.
batterieS WitH HyDrOMeter
eye: Do not depend on hydrometer eye
to determine battery charge level.
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.
WarninG! tO preVent SeriOUS
inJUry, Fire, anD prOperty DaMaGe:
Monitor charging during use.
tM
Page 8 For technical questions, please call 1-800-444-3353. 57015
SaFety OperatiOn MaintenanceaSSeMbly
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.
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.
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.
7. When disconnecting charger, turn switches to
off, disconnect AC cord, remove clip from vehicle
chassis, and then remove clip from battery terminal.
8. After use clean, then store the charger
indoors out of children’s reach.
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.
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.
6. When disconnecting charger, always do
so in reverse sequence of connecting
procedure and break first connection while
as far away from battery as practical.
7. After use clean, then store the charger
indoors out of children’s reach.
Page 9For technical questions, please call 1-800-444-3353.57015
SaFetyOperatiOnMaintenance aSSeMbly
Operation
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.
1. Follow directions on page 7 to connect
Charger to battery, then plug Power Cord
into a properly grounded outlet.
note: If Fault LED lights, unplug Charger and
check that cable connections are correct.
2. Press Mode Button to choose voltage.
3. When a good connection has been made,
Voltage and Standby LEDs will light and Charging
Indicator LEDs will display charging status.
4. Charging is complete when 100%
Charging Indicator LED is lit. charger
will go into trickle charge mode, which
requires monitoring by the user.
5. When finished, unplug Power Cord, then
disconnect negative (BLACK) clamp,
then remove positive (RED) clamp.
6. After use clean, then store Charger
indoors out of children’s reach.
tM
Page 10 For technical questions, please call 1-800-444-3353. 57015
SaFety OperatiOn MaintenanceaSSeMbly
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 tOOl 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 tool 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.
note: Reference UPC 193175558367.Troubleshooting.
Page 11For technical questions, please call 1-800-444-3353.57015
SaFetyOperatiOnMaintenance aSSeMbly
trouble Shooting
problem possible causes likely Solutions
Unit not charging -
LEDs not shown.
1. No power to charger.
2. Battery cables not making connection.
3. Battery voltage too low or battery is bad.
1. Check power and cable
outlet connections.
2. Clean battery cables and
reset cable clamps.
3. Check and/or replace battery,
use different charger.
Charging current not
to full output.
1. Battery is partially charged.
2. Defective battery,
will not hold full charge.
1. Continue charging battery.
2. Check and/or replace battery.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect power supply before service.
leD indicators
leD indicator Meaning
Battery Charge Level/Charge Status
1. Battery Charge Level: 20%-40%-60%-80%-100%
2. Charging: LEDs light up from left to right.
3. Fully Charged: All LEDs light up constantly.
Standby Indicates the charger is powered and ready for use.
Fault
Indicates there is an error or fault, such as
reversed polarity or short circuit.
6V 6V mode
12V 12V mode
26677 agoura road • calabasas, ca 91302 • 1-800-444-3353
tM
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.
