A: Backlight Brightness Level - Amperage - Battery Life

Level 1 - 8mA - 125h
Level 2 - 14mA - 71h
Level 3 - 24mA - 41h
Level 4 - 35mA - 32h
Level 5 - 48mA - 24h
Level 6 - 671mA - 16h
Level 7 - 75mA - 15h
Level 8 - 90mA - 13h
Level 9 - 105mA - 9h
Level 10 - 117mA - 8h

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.