You can display the battery status by briefly pressing the power button. The charge level is signalled by three white LEDs:
| 66-100%: | all 3 LEDs light up |
| 33-65%: | 2 LEDs light up |
| 11-32%: | 1 LED on |
| 6-10%: | Warning tone, 1 LED flashes slowly (1/second). |
On some smartphones, the battery level is also shown on the display.