The battery can only be charged if inserted into the telephone. The charging process
is completely controlled by the mobile. Different kinds of Siemens chargers out of the
accessory program for C25 models can be used for this task:
Ø Standard charger
Ø Quick charger
Ø Desk top charger
(This device is not really a charger but a stand for the mobile, where
Standard- , Quick- or Travel charger are connected to)
Ø Travel charger
Ø Car charger
Charging the battery can be impossible, if the temperature is too high (e.g. in car use
during summer) or too low. This is to prevent the battery from being damaged during
fast charge process. To enable the charging process again, battery and phone only
needs to cool down/warm up. A replacement of battery is not necessary.
Short Circuit Protection
The battery is not short-circuit protected by an electronic fuse like e.g. in S10. Inside
the battery a polyswitch is protecting the battery cells from a too high output current.
Schematic of the battery:
Service Manual C25 / C2588
Avoid short circuit of battery !
Page 24 of 32
Private Communication Systems
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