Checking The Remaining Battery - Sony DR-BTN200 Help Manual

Status
Communication time (including music playback time) (up
to)
Standby time (up to)
The communication time will be about 24 hours when it is charged for 2 hours.
Time stated above may vary, depending on ambient temperature or conditions of
use.

Checking the remaining battery

If you press the POWER button while the headset is turned on, the indicator (red)
flashes. You can check the remaining battery by the number of times the indicator
(red) flashes. The indicator (red) flashes immediately after the headset is turned on
to indicate the remaining battery power.
Indicator (red) Status
3 times
2 times
1 time
Note
You cannot check the remaining battery during pairing operation.
When the battery is almost empty
The indicator turns red. When the battery becomes empty, the headset sounds a
beep and turns off automatically.
Full
Mid
Low (needs to charge)
Copyright 2013 Sony Corporation
30
Approx. usage
hours
40 hours
800 hours