Philips Respironics CPAP Battery Pack is designed to provide uninterruptible power to your CPAP device even during power outages. Manufactured by Philips Respironics, the battery is lithium ion with a long charge life. This CPAP Battery Kit is also known as the PAP Battery Kit. This versatile charger plugs into an AC power source to recharge the external battery. The battery pack can power your CPAP device for more than 14 hours before needing a recharge.