What is the battery's capacity in Ah or Watt-hours? I plan to use this more for powering and charging other devices so longevity is more important.

HI SPEC. AS FOLLOWS4000 Amp UltraSafe Lithium Jump StarterThe GB150 is a portable lithium-ion battery jump starter pack that delivers 4,000-amps (22,500 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, or powering 12-volt devices, like a tire inflator, power inverter and much more. And designed for a car, boat, RV, truck and more with both gas and diesel engines up to 10 liters and more.A lithium battery jump starter rated at 4,000 Amps (22,500 Joules3S).Spark-proof connections and reverse polarity protection.Recharges USB devices, like smartphones, tablets, and more.Power 12V devices anywhere, like tire inflators, power inverters, and more.500 lumen LED flashlight with multiple modes, including SOS.Jump starts both gas and diesel engines up to 10 liters and more.Provides up to 80 jump starts on a single charge.

How long does the GB150 maintain a charge when not in use?

I set it in my calendar to charge every 6 months. I have had to use this twice since I have owned it. Both times it had been under the seat of my pickup for at least 4 months. Performed as expected. The last time was about 2 months ago. The device had been in my truck for over 4 months and it cranked over a friend's big Lexus engine just fine. You only have to use it once for it to be paid for.

What is warrantee? I have had a 4000A unit for just over 3 years and unit caught on fire with an incredible amount of smoke had total melt down?

We're very sorry to hear about the trouble with your GB150. The Boosts have a 1-year warranty for replacements, but please contact NOCO Support directly for assistance.

Why is the capacity reduced to 3000a from 4000a and the maximum engine sizes went down a from 10.0l to 9.0l gas? but you say the 3000a is more power?

I believe the Noco marketing department just made some adjustments to make the specs "slightly" more realistic. I believe that the new "3000A" units are essentially the same as the older "4000A" units. See my previous answer on this page (Newest first) for much more info. Hope this helps. :)

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⚡ Never get stranded again—power, safety, and light in your palm!

RUGGED READY - IP65 water-resistant, rubberized casing, and lightweight at just 7.5 lbs—built for every adventure.
ULTRA SAFE TECH - Mistake-proof spark-proof and reverse polarity protection for worry-free use anytime, anywhere.
POWERFUL COMPACT - 4000 amps peak output to jump start up to 10L engines in seconds, all in a sleek, portable design.
LONG LASTING CHARGE - Holds power for up to 1 year and delivers up to 80 jump starts on a single full charge.
MULTI FUNCTION POWERHOUSE - Jump starter, power bank, and 7-mode LED flashlight—your all-in-one roadside essential.

The NOCO Boost HD GB150 is a 4000-amp peak portable lithium jump starter designed for 12V vehicles with engines up to 10 liters. It safely delivers up to 80 jump starts per charge with spark-proof and reverse polarity protection. Beyond jump-starting, it doubles as a power bank and features a 500-lumen LED flashlight with multiple modes. Rugged, water-resistant, and lightweight, it’s engineered for reliable performance in any condition.

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The product quality is outstanding. Exactly what I needed for my work.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Brand	NOCO
Item Weight	2.9 kg
Amperage	3000 Amps
Peak Output Current	4000 Amps
Specification Met	CE
Manufacturer	THE NOCO COMPANY
UPC	046221150063
Global Trade Identification Number	00046221150063, 01210000615060
Department	unisex-adult
Language	English
Item model number	GB150
Product Dimensions	20.8 x 12.4 x 34.8 cm; 2.9 kg
ASIN	B015TKSSB8

NOCO Boost HD GB150 4000 Amp 12-Volt Ultra Safe Portable Lithium Car Battery Jump Starter Pack For Up To 10-Liter Gasoline And Diesel Engines

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