Nextar ME09EH User Manual page 26

General Setup
Power
Tap in the Setup menu to enter Power menu, as shown
below:
The Power menu displays the unit's battery status. The values are
between 0% and 100%, where 0% means the battery power has run
out completely, and 100% represents a full battery power. When the
battery is being charged, the Battery Status will indicate "Charging".
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