Icom IC-M73 Instruction Manual page 40

9
BATTERY CHARGING
Using the battery out of its specified temperature range will
reduce the battery's performance and battery life. Please
note that the specified temperature range of the battery may
exceed that of the transceiver. In such cases, the transceiver
may not work properly because it is out of its operating tem-
perature range.
CAUTION: Shorter battery life could occur if the battery is left
fully charged, completely discharged, or in an excessive tem-
perature environment (above +50˚C; +122˚F) for an extended
period of time. If the battery must be left unused for a long
time, it must be detached from the radio after discharging. You
may use the battery until the remaining capacity is about half,
then keep it safely in a cool dry place with the temperature
range as below;
–20˚C to +50˚C (–4˚F to +122˚F)
–20˚C to +40˚C (–4˚F to +95˚F)
–20˚C to +20˚C (–4˚F to +68˚F)
BE SURE to replace the battery pack with a new one ap-
proximately five years after manufacturing, even if it still holds
a charge. The inside battery material will become weak after
a period of time, even with little use. The estimated number
of times you can charge the battery is between 300 and 500.
Even when the battery appears to be fully charged, the oper-
ating time of the radio may become short when:
• Approximately five years have passed since the battery was manu-
factured.
• The battery has been repeatedly charged.
32
(within a month)
(within three months)
(within a year)
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D Charging caution
R DANGER! NEVER charge the battery pack in areas with
extremely high temperatures, such as near fires or stoves,
inside a sun-heated car, or in direct sunlight. In such environ-
ments, the safety/protection circuit in the battery will activate,
causing the battery to stop charging.
R WARNING! NEVER charge the transceiver during a light-
ning storm. It may result in an electric shock, cause a fire or
damage the transceiver. Always disconnect the power adapt-
er before a storm.
R WARNING! DO NOT charge or leave the battery in the
battery charger beyond the specified time for charging. If the
battery is not completely charged by the specified time, stop
charging and remove the battery from the battery charger.
Continuing to charge the battery beyond the specified time
limit may cause a fire, overheating, or the battery may rupture.
R WARNING! Occasionally observe the battery pack condi-
tion while charging. If any abnormal condition occurs, discon-
tinue using the battery pack.
R WARNING! NEVER insert the battery and transceiver
(battery attached to the transceiver) into the charger if it is
wet or soiled. This could corrode the battery charger termi-
nals or damage the charger. The charger is not waterproof.
CAUTION: DO NOT charge the battery outside of the speci-
fied temperature range: +10˚C to +40˚C (+50˚F to +104˚F).
Icom recommends charging the battery at +20˚C (+68˚F).
The battery may heat up or rupture if charged out of the spec-
ified temperature range. Additionally, battery performance or
battery life may be reduced.