8. About the battery
Charging and discharging
Chargeable battery is used for the equipment. The battery may be
charged and discharged for several hundreds of times and finally
will be disabled. In case the standby time and call duration shorten
obviously, please replace the battery. Only use batteries approved
by Nokia and the applicable charger approved by Nokia for
charging. If the battery is replaced and used for the first time, or
the battery has been kept for a long time before using, it may be
necessary to connect with the charger, disconnect and then
reconnect in order to charge the battery.