Make sure you hear a clicking noise when inserting the Z1 or Z2 into the PowerShell.
If it is still not charging disconnect the Z1/Z2, battery, and power supply and reconnect.
Proceed to recharge your unit again for 10-12 hours. If it is still not holding a charge it will need to be sent in for a return by the provider you purchased your unit from.
Please keep the following information in mind after charging your Power Shell:
Disconnect the battery from the PowerShell after a full charge to prevent the battery from slowly draining within a 2-3 day period.
The battery needs to be charged for 10-12 hours to ensure a full charge.
The bars of battery life on the LCD screen need to be full, and not blinking.
The PowerShell battery will not charge while it is operating the Z1/Z2 for treatment. The battery must be charged between treatments.