Inogen One G4 4 Cell Battery

The Inogen One G4 single battery can last up to 3 hours at a flow setting of 2 when it is fully charged. The G4 rechargeable lithium-ion single battery is a perfect power source to give you independence and mobility for trips or other activities. The single battery will also fit comfortably in your G4 carry bag or in most accessory bags or purses.