Inogen One G3 Standard (8-Cell) Battery - Portable Replacement Battery - Oxygen Accessory - for The One G3 – 1.3 lbs. – 8.75 x 3.0 x 1 in.

My supplier wants over$300 for a battery to fit my portable concentrator. Got it here for $90. When fully charged, gives me 4.5 hours of machine time. Now when I go out, I can breathe for about 9 hours before having to stop for recharge. Works great! Thanks

Timely delivery. Exactly what I needed.

As advertised

I have used up one battery lots of times so need more battery life if I can't charge. This is way less expensive than a double battery. I get about 4 hours per battery at 2 liters.

These batteries work great and mine had been mounted to a concentrator before.For the money I bought 2 more because they are factory take offs that work very well at quarter the price of the Inogen store.Use your Inogen G3 to harge them all before you go out.I have a double battery and 3 singles that cost the same as half a double battery.This was a Good Deal.

I bought two batteries and a charger. I feel so much more freedom knowing I have these extra batteries and can stay to the end of the grandkids ballgames etc. They were exactly what I wanted at a reasonable price.

I bought 2 of these batteries and neither one of them stay up like they’re supposed to. I don’t even get half of the time out of them that I’m supposed to very disappointed waste of money I should’ve bought from Inogen themselves. At least I would’ve known they were new. I think these were used batteries.

Our Imogen machine was needing service. Installed these in less than 10 minutes. Working great now.