Please note that it can take up to 10 hours to charge a fully depleted battery. The battery will charge when the AC adapter is plugged into the PowerShell™ and wall outlet, but only when the Z1™ is in ‘standby-mode’- meaning when the device is plugged in but NOT in use/ being used for therapy.
If this does not solve the problem or if the issue presents itself again, please contact your supplier or HDM Customer Service for further support.
When your battery has a full charge it will be displayed on the Z1 LCD screen.
The battery will not charge if the temperature is over 80 degrees Fahrenheit. This is a safety feature of the lithium battery.