InogenExtended (8-Cell) Battery - Replacement Battery - for The One G4 Rove 4-1.1 lb. - 5.91 x 2.68 x 1.34 in.

Yeah, it’s good

Fast shipping, battery needed for a relatives O2 device and worked as intended, best price

If you're on road trip you need an extra battery

It’s really hard to get excited over a battery, but the price was right and it is in my compact oxygen machine working very well. Thank you.

We got my hubby an Inogen One G4 which advertised a 4.7 hour on setting 2 double battery life, Nope. Closer to 3.45 on setting 2. Jumps up and down by 30 minutes sometimes (according to the app). So to be on the safe side and never caught off guard we purchased several other doubles to try to make sure we always with power. Still haven't figured out how/why the battery life drops and rises like it does, but thankful that he can continue to keep life as normal as possible by being able to get out and about.UPDATE: We've had these long enough to determine that heat and humidity play a large part in the lifespan of the battery. When we are outside and it's hot and humid, the battery life goes down, sometimes significantly, depending on how hard he's breathing. I've since learned to always learned to carry a spare, and we did buy a car adapter so we can get to the car and "plug him in".Issues or not, this is still the best thing ever. We'd both be miserable if he (we) didn't have the ability to get out and about (without lugging tanks). We continue to learn what we can and cannot do, and about how long we can do it, but always carry a spare battery, just in case!!

Having COPD and needing the use of oxygen, this battery pack makes it easy for me to enjoy outside activities.

Used for my portable oxygen concentrator. Received promptly,and packed well

I used this battery as a spare for my new G4. After several uses it is now flashing red on my charger which indicates the battery is bad. It has not been lasting very long in the machine. I called MCS who is listed as the supplier however they said, according to the serial number, they sold the battery used to Dante corporation who sold it on Amazon. It's a used four year old battery but there is no mention of that in the product description. It was a waste of money!!!!