All battery purchases are final sale. There are no returns on batteries. Inogen One G3 Rechargeable Lithium Ion Cell Battery will power the Inogen One G3 Portable Oxygen Concentrator System without connection to an external power source. It will charge automatically while in the Inogen One G3 system (when connected to an AC or DC power supply), or using the external battery charger. *FEATURES*-Inogen One G3 Rechargeable Lithium Ion Cell Battery is the perfect power source for trips to the store, seeing a movie, or a dinner out with friends-When fully charged the 16 cell battery will last up to 8 hours at an average flow rate of 2-Higher flow settings, such as 4 or 5, will reduce overall battery time Battery life Setting of 1: 13 hours Setting of 2: 10 hours Setting of 3: 7 hoursSetting of 4: 5 hours Setting of 5: 3 hours 48 minutesSetting of 6: 2 hours 45 minutes
