Nokia E75 - Manual (Page 171)

Battery
Battery and charger
information
Your device is powered by a rechargeable battery. The battery
intended for use with this device is BL-4U. Nokia may make
additional battery models available for this device. This
device is intended for use when supplied with power from
the following chargers: AC-8. The exact charger model
number may vary depending on the type of plug. The plug
variant is identified by one of the following: E, EB, X, AR, U, A,
C, or UB.
The battery can be charged and discharged hundreds of
times, but it will eventually wear out. When the talk and
standby times are noticeably shorter than normal, replace
the battery. Use only Nokia approved batteries, and recharge
your battery only with Nokia approved chargers designated
for this device. Use of an unapproved battery or charger may
present a risk of fire, explosion, leakage, or other hazard.
If a battery is being used for the first time or if the battery
has not been used for a prolonged period, it may be necessary
to connect the charger, then disconnect and reconnect it to
begin charging the battery. If the battery is completely
discharged, it may take several minutes before the charging
indicator appears on the display or before any calls can be
made.
Always switch the device off and disconnect the charger
before removing the battery.
Unplug the charger from the electrical plug and the device
when not in use. Do not leave a fully charged battery
connected to a charger, since overcharging may shorten its
lifetime. If left unused, a fully charged battery will lose its
charge over time.
Always try to keep the battery between 15°C and 25°C (59°F
and 77°F). Extreme temperatures reduce the capacity and
lifetime of the battery. A device with a hot or cold battery may
not work temporarily. Battery performance is particularly
limited in temperatures well below freezing.
Do not short-circuit the battery. Accidental short-circuiting
can occur when a metallic object such as a coin, clip, or pen
causes direct connection of the positive (+) and negative (-)
terminals of the battery. (These look like metal strips on the
battery.) This might happen, for example, when you carry a
spare battery in your pocket or purse. Short-circuiting the
terminals may damage the battery or the connecting object.
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