Panasonic CF-53 series Operating Instructions Manual page 5

NOTE
l The battery pack may become warm during recharging or
normal use. This is completely normal.
l Recharging will not commence if internal temperature of the
battery pack is outside of the allowable temperature range
(0 °C to 50 °C).
(è Reference Manual "Battery Power") Once the allow-
able range requirement is satisfied, charging begins auto-
matically. Note that the recharging time varies based on the
usage conditions. (Recharging takes longer than usual when
the temperature is 10 °C or below.)
l If the temperature is low, the operating time is shortened.
Only use the computer within the allowable temperature
range.
l This computer has a high temperature mode function that
prevents the degradation of the battery in high temperature
environments. (è Reference Manual "Battery Power") A
level corresponding to a 100% charge for high temperature
mode is approximately equivalent to an 80% charge level for
normal temperature mode.
l The battery pack is a consumable item. If the amount of
time the computer can be run by using a particular battery
pack becomes dramatically shorter and repeated recharging
does not restore its performance, the battery pack should be
replaced with a new one.
l When transporting a spare battery inside a package, brief-
case, etc., it is recommended that it be placed in a plastic
bag so that its contacts are protected.
l Always power off the computer when it is not in use. Leaving
the computer on when the AC adaptor is not connected will
exhaust the remaining battery capacity.
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