BIG SALE!! Original Inogen G3 8-Cell Single Battery BA-300 Genuine - SAME DAY SHIPPING!! All batteries are lightlyused, inspected and tested for power, power output, functionality, and cleaned. Batteries after they pass testing to hold at least 80% (or better) charge. It doesn't come in the original box. Feel free to contact us for any questions before sale or after sale we have five stars great customer service. Same day free shipping anywhere in the US!! No return.