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Internet #205428102

Model #J312B

Store SKU #1000411752

700 Peak Amp Portable Car Jump Starter with 12-Volt DC outlet and USB Power

  • Ideal for most V6 engines in cars and light duty trucks
  • Designed to warn against improper connection to the battery
  • High output USB port can charge many small electronic devices
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Product Overview

The BLACK + DECKER J312B 700 Peak Amp jump starter is a lightweight, portable, go-anywhere solution for most cars and light-duty trucks. Featuring integrated battery clamps with reverse polarity protection and a special safety switch, this compact unit takes up very little space while offering the ability to restart your car or power up your portable electronics through the included 12 Volt outlet and 3.1 Amp USB port. With a built-in AC charger, you can recharge using a common household extension cord, and the push-button battery status LEDs tell you exactly how much longer it needs to reach full charge. With the BLACK + DECKER J312B 600 Peak Amp jump starter, you get the perfect first line of defense against roadside emergencies and dead batteries.
  • 700 Peak Amp & 300 Instant Amp Starting Power will fire up most vehicles
  • Features 12V DC and USB outlet to power/recharge personal electronics
  • High-intensity pivoting LED worklight for roadside repairs
  • Audible reverse polarity alarm prevents improper connection
  • Comes with safety power switch and LED charge indicator
  • .
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  • California residents

Info & Guides

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700 Peak Amp Portable Car Jump Starter with 12-Volt DC outlet and USB Power
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BrandBLACK+DECKERVectorWagan TechSmartech Products
Name700 Peak Amp Portable Car Jump Starter with 12-Volt DC outlet and USB Power700 Peak Amp Portable Car Jump Starter with USB Power StationiOnBoost Slim Lithium Jumpstarter (200 Amp/300 Amp )JSL-950 Power Station with Jump Starter and 150 PSI Air Compressor, one 120V power inventer outlet
Save $30.00 (23%)
Charger typeACACAC or DCAC or DC
Included PartsWork LightNo Additional ItemsNo Additional ItemsAir Compressor,Work Light
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Cord Length (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Cable gauge
Charger type
Accessory Outlets,Reverse Polarity Protection,Safety Switch
Included Parts
Work Light
Peak Amps
Product Weight (lb.)
Recharge time (min.)
Reserve capacity (Ah)
Starting current (amps)

Warranty / Certifications

Certifications and Listings
ETL Listed,FCC Listed
Manufacturer Warranty
1 year manufacturer warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
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  • What are the dimensions of the product?

Customer Reviews

  • 3.5
    out of 616 reviews
  • 64% recommend this product
Filter by:
Showing 1-10 of 616 reviews
Everything was working, but when I turned on the inverter it exploded and smoke began to come out from the inside.
    • Recommended
    Faulty Product
    The LED light turns on by itself, thus draining the battery. Even if I turn it off, it will turn itself back on. I hope to return it and replace it with a different product.
    Response from Black and Decker 12 VoltJul 14, 2020
    Please contact our Customer Service Team if you'd like further troubleshooting help 1.877.571.2391 (Toll-Free) / CustomerService@BaccusLLC.com BlackandDecker12Volt
    • Pro
    2 people found this helpful
    Never lets me down!! Holds a long and powerful charge, as well!
    Never lets me down!! Holds a long and powerful charge, as well!
    • Verified Purchase
    • Recommended
    Very good! I love it...
    Very good! I love it
    • Verified Purchase
    1 person found this helpful
    Good product helps lat recommend
    Good product helps lat recommend
    • Verified Purchase
    • Recommended
    1 person found this helpful
    It' OK....
    It' OK.
    • Verified Purchase
    Great jump starter
    Great compact and fairly light unit. This is a more simple and elegant way of starting your car without messy, long, and potentially entangled jumping cables. In the back of the unit is a cap hiding a standard two prong male AC plug. It is necessary to have an extension cable plugged into the jump starter during charging. After the unit is charged it can be used for usb, and lighter jack applications to power other things and of course starting a car with a dead battery. A standard charge will last about 30 days. A battery status light in the front of the unit tells the amount of charge ranging from high to low. I have used the unit on low to jump start a mid size truck with no issues. To start a car with a bad battery, one simply attaches the correct color polarity clamps and turns the switch to on position. The car ignition can be turned right away without wait time, as the self contained battery has more than enough potential charge to turn the starter on most mid size vehicles. This unit is roughly 1 foot squared and 3 in in depth so it will fit easily and safely in the trunk of a car, camper, or RV.
    • Recommended
    31 people found this helpful
    Very Useful
    I bought this product back in November 2014 (couldn't wait for the Black Friday sales sadly). I kept it in the car this tough winter because the engine has had trouble turning over. Even though I have Husky 12-foot 8-gauge jumper cables, they are useless if another car doesn't stop. One day, neighbors woke me up and asked if I had jumper cables. I got out the jump starter and on one try, their engine turned over. The best extension cord for this jump starter is a Husky 12 ft. 16/2 Extension Cord. I am very pleased with this product!
    • DIY
    • Recommended
    23 people found this helpful
    Great Jump Starter compact easy to use & Store
    This jump start is compact an easy to use. great backup tool to keep in your car or truck . No more getting stranded because of a weak or dead battery.
    • Recommended
    4 people found this helpful
    Must have for roadside emergencies
    The Black & Decker 300-Amp Portable Jump Starter is something new for me. I've previously gotten jumps with cables or used a battery charger hooked to the wall outlet in my garage.. This unit stores a charge that you can carry in the trunk of your car instead of asking strangers for a boost while on the road. The unit is basically an electrical storage battery you charge before hand with the garage electrical outlet. Its compact, not heavy and fits easily in the car trunk or under the seat. The charge holds for about a month before needing refreshing or again if you actually use the unit. Besides typical battery clamps it comes with a car lighter socket and USB outlet to provide 12-volt current for other applications. It has lights to indicate when it needs recharging and others for the state of the charge. You will need an extension cord as the wall outlet Jump Starter is only a plug. Its really simple to use, just connect the clamps, turn the on/off knob and then turn the ignition key. I found the connecting cables short and was not used to one foot cables. This makes it more important to rest the unit properly while the engine cranks. I was initially concerned it would slip or get caught in the fan. This turned out to be an exaggeration, but care should be used in placing it. I know about jump starts as I've got a slow leak someplace in my electrical harness so I'll be keeping this unit in my trunk to have with me on the road this Winter.
    • Recommended
    29 people found this helpful
    Showing 1-10 of 616 reviews