Inogen Extended (16-cell) Battery - for the Inogen One G5/Inogen Rove 6 - Up to 12 hours, 45 minutes of battery life on setting 1-2.18 lbs.

I like the double battery as it gives a longer time using my portable oxygen machine. Saves having to take tanks with me. A very valuable piece of equipment!

I was skeptical about this battery considering the price compared to directly from the manufacturer, but I purchased it anyway and I am very glad I did. It has performed exceptionally well. It is the real deal.

It works great! Heavy ,but great!

The product has a 2023 -5 production date, it is still new but older stock. The question of warranty might arise if battery fails and production date is used not date of purchase. Arrived when it was scheduled. It also works fine.

Husband of account holder here at Amazon writing the review.......bought a double and a single battery here, and they both came from a location where Inogen has warehousing, and both came delivered in Inogen packaging. Both charged quickly, and after a first use, both seemed to work fine and deliver O2 at Level 3 for the same amount of time my original Inogen batteries that came with the unit lasted. So far, so good, and definitely can't beat the price. I can't see any real signs of use on these suggesting they aren't new or virtually new.