The SeQual Eclipse Replacement Battery is designed for use with any Eclipse portable oxygen concentrator. The power cartridges are easy to use and have an intuitive release that can be easily switched from the Eclipse system, allowing you to extend your time without regular AC or DC power sources. Each replacement battery provides 1 to 5 additional hours of power, depending on the flow rate and setting. The Eclipse power cartridge can be charged in the Eclipse portable unit with AC or DC power, or separately using the Eclipse desktop charger. It is compatible with the original Eclipse, the Eclipse 2, Eclipse 3 and Eclipse 5 systems.