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NOCO 400 Amp GB20 Boost 12V UltraSafe Lithium Jumper Starter

NOCO 400 Amp GB20 Boost 12V UltraSafe Lithium Jumper Starter


NOCO 400 Amp UltraSafe Lithium Jumper Starter

Safely Jump Start A Dead Battery In Seconds™.

Motorcycles, ATV/UTV, Snowmobiles, Watercraft, Lawn & Garden + Cars!

The GB20 is a portable lithium-ion battery jump starter pack that delivers 400-amps (4,650 J3S) for jump starting a dead battery in seconds. It features a patented safety technology that provides spark-proof connections and reverse polarity protection making safe and easy for anyone to use. It's a powerful battery booster that doubles as a portable power source for recharging USB devices, like a smartphone, tablet and more. And designed for a car, boat, motorcycle, RV and more with gas engines up to 4 liters.


Everything you need on one interface.

We designed the user interface to be simple and easy to understand. LED status indicators display the internal lithium batteries charge level and charging status. Error indicators show when connected in reverse polarity or temporarily disabled for thermal protection. Or simply turn on the LED flashlight, recharge a USB device, or use manual override for deeply discharged batteries.

Stay charged.

Keep all of your devices charged and ready to go.


Charge virtually any USB device and stay connected anywhere you go. Capable of quick-charging power-hungry devices, iPhone, iPad, iWatch, GoPro, with enough battery power to recharge a smartphone up to four times.


100-lumen dual LED flashlight.


A rechargeable lithium-powered LED flashlight with seven light modes, including SOS and Emergency Strobe. With multiple luminosity settings, it's immediately adaptable to a variety of situations. Use it's powerful wash light will help you see your engine, changing a tire at night or even warn oncoming traffic when disabled and needing of roadside assistance.

Portable, hand-held design.

Incredible power in a pocket-sized jump box.

Power for power, this lithium jump starter outperforms traditional lead-acid battery booster packs at a fraction of the size and weight. It's over 10X smaller and 8X lighter, and its lithium-powered design makes it more compact and portable than ever before. Conveniently stores in a glove compartment, center console, trunk, or toolbox.


Spans 19.5-inches.

The needle-nosed battery booster clamps span 19.5-inches in length, and capable of reaching most battery posts or chassis ground. It features a high-temperature silicone wire insulation that remains extremely flexible down to -40-degrees centigrade and withstands high levels of duress and even prolonged exposure to high temperatures.

Ultra-safe, ultra-compact, rugged, and portable lithium-ion jump starter. Features spark proof technology and reverse polarity protection. Instantly jump starts most single-battery applications, up to 20 times on a single charge. Ideal for powersport applications with its HD Precision Clamps for battery terminals that are hard to reach.


  • UltraSafe:
    • Protects against reverse polarity, sparks, over-charging, over-current, open-circuits
  • 20X Jump Starts Per Charge:
    • Full power to jump start a vehicle up to 20 times in one charge.  Compatible with engines up to 6.0L
  • 2.1A USB:
    • Recharge virtually any USB device (smartphones, tablets).  Recharge the unit from any USB port or 12V charger.
  • 2XLED:
    • Ultra-bright dual LED flashlight for visibility and with 7 modes,including SOS and emergency strobe. 

Jump starts gas engines up to 4 liters  (For 12V vehicles with single battery systems).


Heavy duty precision clamps with integrated eyelet connectors: The narrow clamps easily reach terminals of powersport batteries and have detachable eyelets as an option when connecting to the battery

Technical Specifications:

Internal Battery: Lithium Ion Micro USB (Input): 5V, 2.1A
Peak Current Rating: 400A USB (Output): 5V, 2.1A
Joules 3S: 4650 J Housing Protection: IP65 (w/ Ports closed)
Operating Temperature: -30°C to +50°C Cooling: Natural Convection
Charging Temperature: 0°C to +40°C Dimensions (LxWxH): 6.7 x 3.2 x 1.7 in
Storage Temperature: -20°C to +50°C  (Average Temperature) Weight: 2.1 Pounds
    Lumens (LEDs): 100L