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4

5

3. Remove jumper clamps from clamp tabs. Connect the red clamp first, 

then the black clamp. 

4. Procedure for jump-starting a NEGATIVE GROUNDED SYSTEM  

(negative battery terminal is connected to chassis) (MOST COMMON)

4a. Connect positive (+) red clamp to vehicle battery’s positive terminal.

4b.  Connect negative (–) black clamp to chassis or a solid, non-moving, 

metal vehicle component or body part. Never clamp directly to 

negative battery terminal or moving part. Refer to the automobile 

owner’s manual.

5. Procedure for jump-starting POSITIVE GROUND SYSTEMS

Note: 

In the rare event that the vehicle to be started has a Positive Grounded System 

(positive battery terminal is connected to chassis), replace steps 4a and 4b 

above with steps 5a and 5b, then proceed to step 6.

5a. Connect negative (–) black clamp to vehicle battery’s negative 

terminal.

5b.  Connect positive (+) red clamp to vehicle chassis or a solid, non-

moving, metal vehicle component or body part. Never clamp directly 

to Positive battery terminal or moving part. Refer to the automobile 

owner’s manual.

6. When clamps are connected properly, turn the Jump-Starter Power 

Switch to ON.

7. Turn ON the ignition and crank the engine in 5-6 second bursts until 

engine starts.

8. Turn the Jump-Starter Power Switch back to the OFF position.

9. Disconnect the negative (–) engine or chassis clamp first, then 

disconnect the positive (+) battery clamp.

WARNING – 

TO REDUCE THE RISK OF INJURY OR PROPERTY 

DAMAGE:

• 

FOLLOW ALL SAFETY INSTRUCTIONS FOUND IN THE “SPECIFIC 

SAFETY INSTRUCTIONS FOR JUMP STARTERS” SECTION OF THIS 

INSTRUCTION MANUAL.

• This power system is to be used ONLY on vehicles with 12 volt DC 

battery systems.

• Never touch red and black clamps together — this can cause dangerous 

sparks, power arcing, and/or explosion.

• After use, turn the Jump-Starter Power Switch off.

CAUTION – 

TO REDUCE THE RISK OF PROPERTY DAMAGE:

• Vehicles that have on-board computerized systems may be damaged if 

vehicle battery is jump-started. Before jump-starting this type of vehicle, 

read the vehicle manual to confirm that external-starting assistance is 

advised.

• Excessive engine cranking can damage the vehicle‘s starter motor. If 

the engine fails to start after the recommended number of attempts, 

discontinue jump-start procedure and look for other problems that need 

to be corrected.

• If the connections to the battery’s positive and negative terminals are 

incorrect, the Reverse Polarity Indicator will light and the unit will sound a 

continuous alarm until the clamps are disconnected.  Disconnect clamps 

and reconnect to battery with correct polarity.

• If vehicle fails to start, turn off the ignition, turn off the Jump-Starter 

Power Switch, disconnect the jump-start system’s leads and contact a 

qualified technician to investigate why the engine did not start.

• Recharge this unit fully after each use.

12 VOLT DC PORTABLE POWER SUPPLY

This portable power source is also for use with all 12 Volt DC accessories 

equipped with a male accessory outlet plug and are rated up to 5 amps.

1. Lift up the cover of the unit ‘s 12 Volt DC outlet.

2. Insert the 12 Volt DC plug from the appliance into the 12 Volt accessory 

outlet on the unit. DO NOT EXCEED A 5 AMP LOAD.

3. Switch on the appliance and operate as usual.

4. Periodically press the battery power level pushbutton to check battery 

status. (When all three battery status LEDs light, it indicates a full 

battery. Only one red battery status indicator light indicates that the unit 

needs to be recharged.)

USB PORT

The USB power port is under the same protective cover as the 12 Volt DC 

outlet on the left hand side of the front panel (refer to the Features section 

to locate)..

1. Push the USB power button to turn the USB port on and the USB power 

indicator will light.

2. Lift up the cover of the USB charging port.

3. Plug the USB-powered device into the USB charging port and operate 

normally.

4. Periodically check the unit’s battery status by pressing the battery 

power level button. (When all three battery status LEDs light, it indicates 

a full battery. Only one red battery status indicator light indicates that 

the unit needs to be recharged.)

Notes: 

 This unit’s USB Power Port does not support data communication. It only provides 5 

volts/2,000mA DC power to an external USB-powered device.

 

Make sure the USB Power Button is in the off position when the unit is being recharged or 

stored.

 

Some household USB-powered electronics will not operate with this unit.

CARE AND MAINTENANCE

All batteries lose energy from self-discharge over time and more rapidly at 

higher temperatures. When the unit is not in use, we recommend that the 

battery is charged at least every 30 days.
From time to time wipe the outside of the appliance with a soft cloth. Do 

not immerse the appliance in water.
There are no user-replaceable parts. Periodically inspect the condition 

of adapters, connectors and wires. Contact manufacturer to replace any 

components that have become worn or broken. 

Battery replacement/disposal

BATTERY REPLACEMENT

The battery should last the service life of the unit. Service life is dependent 

on a number of factors including but not limited to the number of recharge 

cycles, and proper care and maintenance of the battery by the end user. 

Contact manufacturer for any information you may need.
SAFE BATTERY DISPOSAL

Contains a maintenance-free, sealed, non-spillable, lead  

acid battery, which must be disposed of properly.  

Recycling is required. Failure to comply with local, state  

and federal regulations can result in fines, or imprisonment.
Please recycle. 

WARNINGS:

•  Do not dispose of the battery in fire as this may result in an explosion.

•   Before disposing of the battery, protect exposed terminals with heavy-duty 

electrical tape to prevent shorting (shorting can result in injury or fire).

•  Do not expose battery to fire or intense heat as it may explode.

TROUBLESHOOTING

Problem

Solution

Unit will not charge

• Make sure the power switch is in the off 

position.

• Make sure a suitable gage extension cord 

is properly connected to both the unit and a 

functioning AC outlet.

Unit fails to jump-

start

• Make sure unit’s power switch is in the ON 

position.

• Make sure a proper polarity cable connection 

has been established

• Check that unit has a full charge. Recharge unit 

if necessary.

12 Volt DC portable 

power supply 

will not power 

appliance

• Make sure the appliance does not draw more 

than 5 amps.

• Check that unit has a full charge. Recharge unit 

if necessary.

• Use of an attachment not supplied, recommended or sold by 

manufacturer specifically for use with this unit may result in a risk of 

electrical shock and injury to persons.

WARNING: 

RISK OF EXPLOSIVE GASES

• Working in the vicinity of a lead acid battery is dangerous. Batteries 

generate explosive gases during normal battery operation. For this reason, 

it is of the utmost importance that each time before using the jump-

starter you read this manual and follow instructions exactly.

• To reduce the risk of battery explosion, follow these instructions and 

those published by the battery manufacturer and manufacturer of 

any equipment you intend to use in the vicinity of the battery. Review 

cautionary markings on these products and on the engine.

CAUTION –

 TO REDUCE THE RISK OF INJURY OR PROPERTY 

DAMAGE:

• 

NEVER ATTEMPT TO JUMP-START OR CHARGE A FROZEN BATTERY.

• Vehicles that have on-board computerized systems may be damaged if 

vehicle battery is jump-started. Before jump-starting, read the vehicle’s 

owner’s manual to confirm that external-starting assistance is suitable.

• Never smoke or allow a spark or flame in vicinity of vehicle battery, 

engine or power station

• Jump-start procedures should only be performed in a safe, dry, well-

ventilated area.

• Always store battery clamps when not in use. Never touch battery 

clamps together. This can cause dangerous sparks, power arcing and/

or explosion.

• When using this unit close to the vehicle’s battery and engine, stand 

the unit on a flat, stable surface, and be sure to keep all clamps, cords, 

clothing and body parts away from moving vehicle parts.

• Never allow red and black clamps to touch each other or another 

common metal conductor – this could cause damage to the unit and/or 

create a sparking/explosion hazard.

 

For negative-grounded systems, connect the positive (RED) clamp to 

the positive ungrounded battery post and the negative (BLACK) clamp 

to the vehicle chassis or engine block away from the battery. Do not 

connect the clamp to the carburetor, fuel lines or sheet-metal body 

parts. Connect to a heavy gauge metal part of the frame or engine 

block.

 

For positive-grounded systems, connect the negative (BLACK) clamp 

to the negative ungrounded battery post and the positive (RED) clamp 

to the vehicle chassis or engine block away from the battery. Do not 

connect the clamp to the carburetor, fuel lines or sheet-metal body 

parts. Connect to a heavy gauge metal part of the frame or engine 

block.

• If the connections to the battery’s positive and negative terminals are 

incorrect, the Reverse Polarity Indicator will light (red) and the unit will 

sound a continuous alarm until the clamps are disconnected. Disconnect 

clamps and reconnect to battery with correct polarity.

• Always disconnect the negative (BLACK) jumper cable first, followed by 

the positive (RED) jumper cable, except for positive grounded systems.

• Do not expose battery to fire or intense heat since it may explode. Before 

disposing of the battery, protect exposed terminals with heavy-duty 

electrical tape to prevent shorting (shorting can result in injury or fire).

• Place this unit as far away from the battery as cables permit.

• Never allow battery acid to come in contact with this unit.

• Do not operate this unit in a closed area or restrict ventilation in any way.

• This system is designed to be used only on vehicles with a 12 Volt DC 

battery system. Do not connect to a 6 volt or 24 volt battery system.

• This system is not designed to be used as a replacement for a vehicular 

battery. Do not attempt to operate a vehicle that does not have a battery 

installed.

• Excessive engine cranking can damage a vehicle’s starter motor. If 

the engine fails to start after the recommended number of attempts, 

discontinue jump-start procedures and look for other problems that may 

need to be corrected.

• Do not use this jump-starter on a watercraft. It is not qualified for marine 

applications.

• Although this unit contains a non-spillable battery, it is recommended that 

unit be kept upright during storage, use and recharging. To avoid possible 

damage that may shorten the unit’s working life, protect it from direct 

sunlight, direct heat and/or moisture.

FIRST AID

• When working with lead acid batteries, always make sure immediate 

assistance is available in case of accident or emergency.

• Always have protective eyewear when using this product: contact with 

battery acid may cause blindness and/or severe burns. Be aware of first 

aid procedures in case of accidental contact with battery acid.

• Have plenty of fresh water and soap nearby in case battery acid contacts 

skin.

• 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 similar 

metal object, to skin, causing a severe burn.

• Do not wear vinyl clothing when jump-starting a vehicle when jump-

starting a vehicle, friction can cause dangerous static-electrical sparks.

• 

Skin:

 If battery acid contacts skin or clothing, wash immediately with 

soap and water for at least 10 minutes. If redness, pain, or irritation 

occurs, seek immediate medical attention.

• 

Eyes: 

If battery acid comes in contact with eyes, flush eyes immediately, 

for a minimum of 15 minutes and seek immediate medical attention. 

SAVE THESE 

INSTRUCTIONS

INTRODUCTION

Congratulations on purchasing your new 

Black + Decker

®

 Jump-Starter

Read this Instruction Manual and follow the instructions carefully before 

using this unit. 

CHARGING/RECHARGING

Lead-acid batteries require routine maintenance to ensure a full charge 

and long battery life. All batteries lose energy from self-discharge over time 

and more rapidly at higher temperatures. Therefore, batteries need periodic 

charging to replace energy lost through self-discharge. When the unit is 

not in frequent use, manufacturer recommends the battery be recharged at 

least every 30 days.

Notes: 

This unit is delivered in a partially charged state – you must fully charge it upon purchase 

and before using it for the first time. Initial AC charge should be for 24 hours.

 

Recharging battery after each use will prolong battery life; frequent heavy discharges 

between recharges and/or overcharging will reduce battery life. The battery can be 

recharged using the Built-In 120 Volt AC Charger.

 

Make sure all other unit functions are turned off during recharging, as this can slow the 

recharging process.

 

If the battery is overly discharged and the green LED lights when the charger is plugged in, 

this indicates the battery is at a high impedance stage. If this occurs, recharge the unit and 

leave it charging for a period of 24-48 hours before use.

CAUTION – 

RISK OF PROPERTY DAMAGE: 

Failure to keep the battery 

charged will cause permanent damage and result in poor jump starting 

performance.

Charging/Recharging Using the 120 Volt AC Charger and 

a Standard Household Extension Cord (not included)

1. Lift the AC adapter cover located on the back of the unit and connect 

an extension cord to the unit. Plug the other end of the cord into a 

standard 120-volt AC wall outlet.

2. Charge until the green Battery Status LED Indicator lights solid or flashes.

3. Disconnect the extension cord and depress the battery status button. If 

all 3 status lights illuminate, the unit is fully charged.

JUMP-STARTER

This Jump-Starter is equipped with an Jump-Starter Power Switch. Once 

the connections are properly made, turn the switch on to jump-start the 

vehicle.

1.  Turn off vehicle ignition and all accessories (radio, A/C, lights, connected 

cell phone chargers, etc.). Place vehicle in “park” and set the 

emergency brake. 

2. Make sure the Jump-Starter Power Switch is turned to off.

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J312B_ManualENSP_061920.indd   4-5

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6/19/2020   1:49:53 PM

Summary of Contents for JUMP iT J312B

Page 1: ... disponibles a través del fabricante Si necesita ayuda con respecto a los accesorios por favor póngase en contacto con el fabricante al 877 571 2391 ADVERTENCIA El uso de cualquier accesorio no recomendado para el uso con esta unidad podía ser peligroso INFORMACIÓN DE SERVICIO Si usted necesita asesoramiento técnico reparación o partes genuinas del fabricante póngase en contacto con el fabricante ...

Page 2: ...STRUCTIONS FOR CHARGING THIS UNIT IMPORTANT This unit is delivered in a partially charged state Fully charge unit with a household extension cord not supplied for a full 24 hours before using for the first time You cannot overcharge the unit using the AC charging method To recharge this unit use only the built in AC Charger All Power switches should be in the OFF position when the unit is charging...

Page 3: ...y the battery manufacturer and manufacturer of any equipment you intend to use in the vicinity of the battery Review cautionary markings on these products and on the engine CAUTION TO REDUCE THE RISK OF INJURY OR PROPERTY DAMAGE NEVER ATTEMPT TO JUMP START OR CHARGE A FROZEN BATTERY Vehicles that have on board computerized systems may be damaged if vehicle battery is jump started Before jump start...

Page 4: ... retailer for their specific return policy regarding returns that are beyond the time set for exchanges This warranty does not apply to accessories bulbs fuses and batteries defects resulting from normal wear and tear accidents damages sustained during shipping alterations unauthorized use or repair neglect misuse abuse and failure to follow instructions for care and maintenance for the product Th...

Page 5: ...dicional en su distribuidor local Guarde los artefactos que no utilice en el interior Cuando no los utilice los artefactos deben guardarse bajo techo en un lugar seco alto o bajo llave lejos del alcance de los niños No tire del cable Nunca transporte el aparato por el cable ni lo jale para desconectarlo del tomacorriente Mantenga el cable alejado del calor el aceite y los bordes afilados Desconect...

Page 6: ...idez cuando están a temperaturas más altas Por lo tanto las baterías necesitan ser cargadas periódicamente para reemplazar la energía perdida por descarga espontánea Cuando la unidad no se usa fabricante recomienda que se recargue la batería al menos cada 30 días Notas Esta unidad se entrega en un estado parcialmente cargado usted debe cargarlo completamente antes de usarlo para la primera vez La ...

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