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. :)

Brand	NOCO
Product Dimensions	8.19"D x 4.88"W x 13.7"H
Item Weight	6.4 Pounds
Amperage	3000 Amps
Peak Output Current	3000 Amps
Specification Met	UL
Manufacturer	NOCO
UPC	046221150063
Global Trade Identification Number	00046221150063, 01210000615060
Automotive Fit Type	Universal Fit
Model	GB150
Item Weight	6.39 pounds
Item model number	GB150
Batteries	1 Lithium Metal batteries required. (included)
Is Discontinued By Manufacturer	No
Exterior	Machined
Manufacturer Part Number	GB150
OEM Part Number	GB150
Bulb Type	LED
Special Features	3000A 12V Portable Lithium Car Battery Jump Starter, 500 Lumen LED Flashlight, Portable Power Bank for USB Devices, Reverse Polarity and Spark-Proof Protection

Boost GB150: 3000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 9.0L Gas and 7.0L Diesel Engines

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