Step into a world of convenience and extended oxygen therapy with the ARYA Go Portable Oxygen Concentrator 8-cell battery and its remarkable battery power. Unlike traditional oxygen tanks, this cutting-edge device operates on rechargeable lithium-ion batteries, providing you with freedom and flexibility. The ARYA Go 8-cell battery fully charges in just 3.5 hours and delivers up to 4 hours of battery operation using a setting of 2. When it's time to recharge, simply plug it into either an AC or a DC outlet, with the AC supply ideal for home and the DC supply for charging on the go in your vehicle's 12V outlet. Swapping between batteries is effortless, thanks to the user-friendly design that allows you to easily remove and replace them from the bottom of the unit. For those with multiple batteries, an external battery charger allows you to recharge batteries at home without the need to plug in your device.