When used for the backup;
Approx. 100 days with a fully charged battery.
Approx. 6 days with a half charged battery.
NOTE
*
When the message [RAAA051 Low battery] appears, supply power to the display unit and fully charge the battery. The battery requires 24 hours of charging to reach a level that allows backup operation, and about 96 hours (4 hours) to be fully charged.