The CPAP Shop: If you have sleep apnea and travel frequently, chances are you are going to need a reliable backup power source for your CPAP/BiPAP machine.The CPAP Shop offers a ton of great deals on portable power accessories, such as the Portable Outlet Battery. The Portable Outlet Battery can accommodate up to 3 devices simultaneously! The LED meter indicates remaining battery life and a DC inverter (sold separately) allows you to charge the unit in your vehicle.Check out the Portable Outlet Battery and other power accessories at The CPAP Shop today!