Nokia XPRESS MUSIC 5730 - Manual (Page 71)

Accessories
Warning: Use only batteries, chargers, and
accessories approved by Nokia for use with this particular
model. The use of any other types may invalidate any
approval or warranty, and may be dangerous. In particular,
use of unapproved chargers or batteries may present a risk
of fire, explosion, leakage, or other hazard.
For availability of approved accessories, please check with
your dealer. When you disconnect the power cord of any
accessory, grasp and pull the plug, not the cord.
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, K, 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.
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.
Safe removal. Always switch the device off and disconnect the
charger before removing the battery.
Proper charging. 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.
Avoid extreme temperatures. 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.
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