Nokia 9210 User Manual page 34

23
Use only batteries approved by the communicator manufacturer and recharge the
battery only with the chargers approved by the manufacturer. With approved
chargers and accessories, the battery can be charged continuously.
The battery need not be fully discharged before recharging. When a charger is not
in use, disconnect it from the power source. Do not leave the battery connected to
a charger for longer than a week, since excessive charging may shorten its life. If
left unused, a fully charged battery will discharge itself over time.
The battery can be charged and discharged hundreds of times, but it will eventually
wear out. When the operating time (talk-time and stand-by time) is noticeably
shorter than normal, it is time to buy a new battery.
Temperature extremes will affect the ability of your battery to charge: allow it to
cool down or warm up first.
Battery operation time is affected by the following: whether both the phone and
the communicator interface are on, radio signal strength, various phone settings,
and the length of the screen blanker period.
It is recommended always to keep a charged battery in the communicator. Keeping
the battery charged maximises the lifetime of the backup battery supplying power
to the real-time clock of the communicator. In case the backup battery is drained,
it will be automatically charged the next time a charged battery is reconnected to
the communicator.
Always close the device cover before removing the battery. Closing the cover will
save all data.
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