Dual Compatibility The Inogen External Battery Charger is designed to charge both Inogen One G4 and Inogen Rove 4 batteries Try Simultaneous Charging If you need to recharge multiple batteries at once order an extra Inogen External Battery Charger allowing you to keep your batteries charged and ready to use Compact and Lightweight With dimensions of 313 in W x 275 in L x 1 in H and a weight of just 012 lbs this charger is portable and lightweight to fit into your travel plans OntheGo Power Solution It charges Inogen One G4 and Inogen Rove 4 standard and extended batteries helping you maintain your mobility Manufacturer Assurance This product is a genuine Inogen accessory ensuring compatibility with your devices