There are two Rechargeable Lithium Ion Batteries available for the Inogen One G4 - the Single (4-Cell) Battery and the Double (8-Cell) Battery. Both batteries are designed for use with all Inogen One G4 Oxygen Concentrators.Inogen One G4 batteries will charge automatically while in the Inogen One G4 device (when connected to an AC or DC power supply), or using the External Battery Charger.
The Inogen One G4 double battery can last up to 6 hours.The double battery will also fit comfortably in your G4 carry bag or in most accessory bags or purses.
Note : This battery competibale with Inogen One G4 portable oxygen concentrator
