User's Guide

RA-7120
User Manual
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CAUTION!
Do not charge batteries at a temperature lower
than 0°C, which will increase the internal
resistance to cause heat and make the batteries
unstable and unsafe. Please use a battery
temperature detecting device for a charger to
ensure a safe charging temperature range.
Battery Storage and Safety Notice
Although charged Lithium-Ion batteries may be
left unused for several months, their capacity
may deplete due to buildup of internal resistance.
But the batteries may deplete more rapidly at the
warmer end of this range. It is recommended to
store batteries at room temperature.