For the current supply of the terminal the Lithium-Ion battery HA-D20BAT-A is used. A rechargeable, not exchangeable by the user, backup battery secures the main memory if the capacity of the main battery is low or during the change of the main battery. The backup battery is charged by the main battery.
Main Battery (3.7V)
4 - 6 Hours
8 - 12 Hours
You can shorten the chargen time for the main battery by using external charger HA-D32DCHG. Further information, especially about calculating the running time can be found in the Hardware Manual.
If both main and backup battery are fully depleted, you might not be able to switch the device on. Insert a charged main battery and wait for the backup battery to recover.