This is the replacement 14.4 volt lithium ion battery for the HDM Z1 and Z2 CPAP PowerShell module. These batteries are specifically designed for the Z1and Z2 CPAP units with the PowerShell module and will not work with any other device.
This is the battery only. You must already have the Z1 PowerShell module to use these batteries. The batteries attach to the PowerShell battery shuttle with Velcro.