Nanfone NF-173, Manual

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Charging the Lithium Battery Pack
The battery pack is without completely
charging when finished, and please charge it
before using.
When used for the first time after
purchased or stored over two months, the
capacity of battery pack is less than normal.
However, it will return normal after charged
and discharged for three or five times.
Green light shines when start charging, red light
is on while it is charging and the green light indicate
that the charging is finished.
Note
：
NF-173
has two independent charging
channels for the whole machine and battery pack,
but it cannot charge by the two way at the
same time, otherwise it will be failed
charge.