The Inogen One G4 External Battery Charger is designed to efficiently recharge both single and double batteries for your Inogen One G4.
For Portable Oxygen Concentrator users with an active lifestyle requiring frequent battery recharges, it's recommended to consider purchasing an additional charger. This way, you can easily charge multiple Inogen One G4 batteries simultaneously, ensuring you have a continuous power supply to support your on-the-go lifestyle.