Inogen One G4 External Battery Charger with Power Supply

The Inogen One G4 External Battery Charger is the ideal power source for recharging your additional Inogen G4 single and double batteries, allowing you to keep multiple batteries charged and ready for use whenever you need them. Batteries can be fully charged outside the G4 unit in under 5 hours. A fully depleted G4 single cell battery can be charged to full in 2.5 hours, and a fully depleted G4 double cell battery will be charged to full in under 5 hours.