Deep Discharge Battery - Siemens C35 series Service Manual

1. Rapid charger
2. Travel charger
3. Car charger
4. Desktop charger
PHOTO 2.33 INSERT CHARGER
Photo 2.33 shows the correct way of inserting and removing the charger plug.

Deep Discharge Battery

In case of a deeply discharged battery, the voltage of the battery is too low to operate the
charging circuit and the display controller, the phone can not be turned on and the normal
charging process can not be started. No charging symbol is visible in the display.
In this case, charging the battery is divided into two different steps, which have to be run
subsequently:
a) Trickle charge for C35 Phone
Trickle charge mode is automatically started if the battery voltage is below 3.0V when the
charger is connected to the mobile. The charging current in Trickle mode is appr. 10mA.
Trickle charge mode has to last minimum until the battery voltage has exceeded 3.2V,
then the phone will switch on and the charging icon appear. 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. If within 4 hours
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. * Always
normal charge a new battery or a deep discharged battery for more then 12 hours before
first use.
Action:
Connect charger to the telephone ( see section on Charging ).
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