Zopec Explore 5500 CPAP Battery (2-3 Nights). Uninterruptible Power Supply (UPS). Works with All Machines! No Adapters Needed! Smallest and Lightest of Its Kind. FAA/TSA Compliant.

AWARD WINNING AND SIMPLY THE BEST: Most reliable and dependable battery with great pricing. Designed for backup power. Can plug in Battery and machine 24/7. Automatically detects power outage and switches to battery power seamlessly. No need to wake up and switch over. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.