Make sure you get the most value and use out of your ARYA Q Powered By Drive with the assurance of receiving medical grade oxygen on the go with the Battery Pack for your ARYA Q Powered By Drive portable oxygen concentrator. The battery pack allows you to enjoy your prescribed dose of medical grade oxygen while out and about, away from a standard wall outlet or DC outlet in your vehicle, providing cord-free use for up to 3.5 hours on a setting of 2. You will never be restricted to a single charging method, as the ARYA Q Powered By Drive gives you the ability to charge in 3 quick and convenient methods. Specifically, you have the ability to charge and operate your concentrator with the AC and DC power supplies. The AC power supply is used when you are at home or near a standard wall outlet, allowing you to charge while receiving oxygen. With a POC you don't want to be tethered to a wall outlet, and you won't thanks to the DC power supply designed for on-the-go charging via a cigarette lighter outlet in your vehicle. Lastly, if you have more than one battery you can get the External Battery Charger to charge extra batteries on the side, externally from your unit.