M3 Mobile SM20 Series User Manual page 11

SM20 Series
User Manual
LED Color
Red
Green
If the battery is used at the temperature other than -20℃ (-4℉) to 60℃ (140℉), the
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device may malfunction or break down.
It takes about 4 hours to fully charge a battery that is fully discharged.
It is recommended to replace a battery every two year.
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If a battery is charged and used continuously, its lifespan will decrease.
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For information on the device battery, Swipe the bottom  Click
Description
Battery is being charged.
Battery is fully charged.
11
Settings  Battery