MR240
TM
VHF Marine Two-Way Radio Instruction Manual
38
BATTERY CAUTION
[continued]
CAUTION:
Shorter battery life could occur if the battery is left fully charged, completely discharged,
or in an excessive temperature environment (above +140°F; +60°C) 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 follows:
–4°F to +122°F (–20°C to +50°C) (within a month)
–4°F to +95°F (–20°C to +35°C) (within three months)
–4°F to +77°F (–20°C to +25°C) (within a year)
CHARGING CAUTION
Charge the battery pack at least once every six months, even if it has been not used for a long
period of time. The battery pack will have slowly self-discharged, even though it has not been used.
If the battery pack is left for a long period without being charged, its life cycle will be shorter, or
worse, it will never accept a charge again.
Due to the characteristics of the Li-ion rectangular battery, the battery pack may change its shape
as the charge and discharge cycles are repeated. This is a normal phenomenon, and it is quite safe
to continue to use the pack, as long as it is properly handled. However, when the shape of the
battery pack is so changed that the battery pack or battery cover can not be correctly attached to
