Samsung BHM3100 - Manual (Page 10)

8
Checking.the.battery.level
At the same time, press and hold the Multi-Function button and the Volume down
button. Depending on the battery level, the indicator light flashes 5 times in one of
the following colours:
Battery.level Indicator.light.colour
Above 80% Blue
80 ~20% Violet
Below 20% Red