Battery brightness 10%

Tablet battery saving when not plugged in

Disable screen timeout

Screen never times out and dims

Turn on WiFi with screen on, except in airplane mode

Twin of switch-off rule to restart WiFi with screen

Disable WiFi if on and disconnected for 2 mins

As I always forget to do it. paired with its twin rule to restart on screen on

USB power screen to 20%

Screen setting for when plugged into PC at work. Bright enough to see but low power use to allow recharge via USB port

Full brightness with mains

When on mains, screen can be turned up full