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In this case, charging the battery is divided into two different steps, which have to be run subsequently: a) Trickle charge Trickle charge mode is automatically started if the battery voltage is below a certain value when the charger is connected to the mobile. This mode is not terminated automatically but has to be terminated by disconnecting the charger. Trickle charge mode has to last minimum until the battery voltage has exceeded a certain level. During trickle charge the charging symbol will not be visible and the telephone can not be turned on. This is because the battery voltage is too low to operate the telephone Action: Insert battery into handset and connect travel charger to the telephone. Wait for appr. 1 hour, then disconnect and reconnect charger. If the battery voltage is high enough again, the charging symbol will come up. If the battery is discharged very deeply, the symbol may not come up and the trickle charge time possibly has to be extended up to 24 hours. b) Normal charge When the battery voltage is above the a.m. value (e.g. by trickle charge) the mobile will start the normal charging mode and show a charging symbol in the display. Action: Connect charger to the telephone. The charging symbol will come up as an indication that the normal charging process has been started by the mobile.
