1. Before measuring the battery draining time make sure your device is 100% charged

Charge the device to full

"b) Listening the music on higher volume will certainly affect the playtime Ideal volume level should be 50-70%"

Listening music at 50-70% is recommended to have better playtime

2. Long time call and Playing game while using the device will cause more battery consumption

3. Varying BT range will affect the device playtime significantly

4. Bluetooth battery consumption varies with different mobile phone models

      e)    Online streaming consumes more battery than downloaded files