The ARYA Go 16-Cell Battery is a high-capacity rechargeable lithium-ion battery that doubles the usage time of the standard 8-cell option for the ARYA Go Portable Oxygen Concentrator. It provides exceptional freedom, delivering up to 16 hours of use on setting 1 and an impressive 8 hours on setting 2, surpassing many competitors. When it's time to recharge, you have multiple convenient options using either an AC or DC power outlet. You can charge it at home with the AC supply or on the go using your vehicle's 12V outlet. For those with multiple batteries, an external charger allows you to recharge spares independently. The user-friendly design makes swapping batteries on the bottom of the unit quick and hassle-free.