Standard and Extended Batteries are great options for those patients that need be gone for extended periods of time. No more worries of running out of battery time as you are able to purchase additional batteries for your portable oxygen concentrator. Just determine your maximum you will be away from charging your machine and we can determine the number of batteries and battery chargers that you need to ease your mind while out and about. Don’t see the battery you need for your portable oxygen concentrator? Call us as at 833-POC4YOU or email us at support@Go2POC.com as we have access to most current and past POC models.