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. :)

ASIN	B015TKSSB8
Amperage	3000 Amps
Battery Capacity	4000 Amp Hours
Battery Cell Composition	Lithium
Battery Composition	Lithium
Brand	NOCO
Brand Name	NOCO
Compatible with Vehicle Type	Passenger Car
Customer Reviews	4.5 out of 5 stars 12,032 Reviews
Global Trade Identification Number	00046221150063, 01210000615060
Item Type Name	NOCO Boost Pro GB150 3000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank Charger, And Jumper Cables For 9-Liter Gasoline And 7-Liter Diesel Engines
Item Weight	3.4 kg
Manufacturer	THE NOCO COMPANY
Manufacturer Part Number	GB150
Peak Output Current	4000 Amps
Specification Met	CE
UPC	046221150063
Unit Count	1 Count
Vehicle Service Type	Passenger Car
Voltage	12 Volts
Whats in the box?	1-Year Limited Warranty, GB150 Portable Car Battery Jump Starter Pack, Heavy-Duty Battery Clamps, Micro USB Charging Cable, User Guide for Jump Starter, XGC Cable, XGC Male and Female Connectors

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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