The NiteOwl CPAP Battery is a portable lithium-ion power source for CPAP and BiPAP machines, designed for both backup use and off-grid operation. It functions as an uninterruptible power supply (UPS), automatically switching to battery mode during outages to maintain therapy without interruption. Approved for air travel (FAA), it’s suitable for camping, RV trips, and other settings without AC power. Runtime may vary depending on machine model, pressure settings, and mask fit. Output voltage ranges from 12–24 V DC, and a Quick Charge 3.0 USB port can power small electronics. The aluminum alloy casing includes a digital display for real-time charge percentage, and charging takes about 2–3 hours with a 90 W AC power supply. Two batteries can be linked for extended operation of up to about 6 nights. Includes: NiteOwl CPAP Battery Output cables for ResMed Air 10, Air 11, AirMini, and Philips DreamStation/System One/DreamStation 2 AC adapter cable for Air 11 and AirMini Uses the CPAP’s AC power supply for charging (optional independent AC power supply available)