Backlight Brightness Level - Amperage - Battery Life

Level 1 - 9mA - 144h
Level 2 - 16mA - 81h
Level 3 - 27mA - 48h
Level 4 - 40mA - 32h
Level 5 - 53mA - 24h
Level 6 - 67mA - 19h
Level 7 - 82mA - 15h
Level 8 - 97mA - 13h
Level 9 - 113mA - 11h
Level 10 - 129mA - 10h

To preserve the battery life, the backlight decreases to Level 1 if no usage after 1 minute. Then, the backlight will turn off if no usage for 3mins. Lastly, the keyboard will enter into sleep mode after no usage of 30 minutes.

The backlight turns off if the keyboard reaches low battery levels (<15%). The total standby time is 13 days and the total working time is 45h of usage.