This replacement power cartridge is designed for use with all Eclipse Oxygen Concentrators * Power cartridges can be quickly switched out of the Eclipse so that you can extend your time away from regular power sources * Each power cartridge will deliver up to 4 hours of Continuous Flow Therapy or 5 hours of Pulse Dose Therapy depending on flow rate and settings * This updated cartridge (with the black button) features an intuitive downward release * COMPATIBILITY: Compatible with all Eclipse 1 2 3 & 5 Series Oxygen Concentrators * CHARGING: All Eclipse Concentrators will charge Power Cartridges in the unit when using AC power * Eclipse 5 Concentrators will charge Power Cartridges in the unit when using DC power (older Eclipse concentrators can NOT charge a Power Cartridge from DC power) * Power Cartridges can also be charged externally using the Eclipse Desktop Charger * CALIBRATION: For best performance SeQual recommends calibrating batteries once a month * To calibrate a battery it should be fully discharged and then fully recharged * For complete instructions on care and operation of your SeQual Eclipse and Eclipse Power Cartridges see your oxygen concentrator manual * HCPCS Code: E1356