Cobra Marine JumPack H2O

  • Cobra Marine Jumpack H2O -
  • Cobra Marine Jumpack H2O -
  • Cobra Marine JumPack H2O
  • Cobra Marine JumPack H2O
  • Cobra Marine JumPack H2O
  • Cobra Marine JumPack H2O
  • Cobra Marine JumPack H2O
  • Cobra Marine Jumpack H2O -
  • Cobra Marine JumPack H2O


1.50 lbs (680.39g)
Height7.25 in (184.15mm)
Width4 in (101.6mm)
Depth1.5 in (38.1mm)


Jump start your car, truck, RV, outboard boat and charge your mobile devices safely in all weather conditions

12000 mAh, 44.4 Wh UL registered lithium-cobalt battery. Holds a charge longer and is smaller than traditional jumpstarters

400 Amp Starting Current, 600 Amp Peak Current. Jump starts gasoline and diesel vehicles

Two Jumpstart Options: Direct from the battery and from the vehicle’s 12V port (CLP)

Charges mobile devices multiple times

Dual 3 Amp USB Ports for rapid charging of two portable devices simultaneously

Built-in LED flashlight - Super-bright Flashlight, Strobe and SOS LED

UL 2743 Safety Standard Compliant

Cobra Marine JumPack H2O



UL 2743 Safety Standard Compliant; Waterproof* Jump Starter / Power Pack

Designed to jump start large V8 gasoline and diesel engines, the new JumPack™ H2O is compliant with the UL 2743

Safety Standard and will keep you going in all-weather conditions.

The new Cobra JumPack XL H2O features two ways to jumpstart a car, one using the traditional jumper cables and a secondary option that allows the vehicle to be started through the 12-volt port (CLP) inside the car for a simple, non-intimidating jump start. 

Charge Multiple Devices | This compact UL 2743 Safety Standard compliant portable power pack contains a powerful 44.4Wh (12,000mAh) battery with dual 3 amp each USB outputs to rapidly charge two 5 Volt portable devices simultaneously making it the ideal emergency battery pack for home, office, vehicle or the outdoors.

Easy-to-Read LED Status Light | The Cobra JumPack™ XL H2O features advanced internal protection circuitry with a visible tri-color (green, yellow, red) jump start status LED that illuminates; Green when the JumPack XL H2O is ready to safely jump start the vehicle; Flashing Yellow indicates wait; and Red indicates a problem has been detected.

Emergency Flashlight | The Cobra JumPack™ XL H2O features a built-in high-intensity flashlight with SOS and Strobe functions for emergencies. It also includes heavy duty jumper cables and two different charging methods; a 12V DC charger to re-charge your JumPack™ XL H2O on the go in the vehicle, and a 120V AC wall charger to re-charge it at home.

*Device is waterproof when power port cover is in place. 


  • Marine JumPack H2O Manual

    Marine JumPack H2O Quick Start Guide

    Marine JumPack H2O Spec Sheet

  • How often should I charge my JumPack?

    To maintain a full charge on your JumPack, it is recommended to charge it every few months.

    If you keep the JumPack in your home, leave the charger plugged in all the time. The internal charging circuit will maintain a full charge on the battery without any risk of overcharging.

    Operating the button on the JumPack


    Press and release the button.  If the battery is fully charged then all four LEDs will illuminate.


    Press and hold the button.  After a few seconds the light should turn on.

    After the light is on:

    1. Pressing the button will cause the light to strobe.

    2. Pressing the button a second time will cause the light to flash an S-O-S signal.

    3. Pressing the button a third time will turn off the light.

    The light does not work.

    To turn on the light, press and hold the button on the JumPack. After a few seconds the light should illuminate. If the light does not turn on, then the battery might be dead. Try charging the JumPack.

    See more FAQs

Product Features

Jumpstart Large Vehicles

Jumpstarts Large V8 Gasoline and Diesel Engines with 12000 mAh, 44.4 Wh UL Safety Standard Compliant Lithium-Cobalt Battery


Functions in All Weather Conditions

USB and LED FlashLight

Dual 3 Amp USB Ports and Super-Bright Built-In LED Flashlight

400 Amp Starting Current, 600 Amp Peak Current

Jump Starts Gasoline and Diesel Engines either Direct-to-Battery or through Vehicle's 12V CLP Port

Ideal for All Vehicles

Jump Start your Car, Truck, RV, or Outboard Boat and Charge your Mobile Devices

In the Box

Includes JumPack, Direct-to-Battery Jumper Cables, 12V Charger Cable, AC Charge Adapter, and Carry Case