If an android tablet (Nexus 7) is plugged into a power source, does the GPS stay on and therefore provide more accuracy?
I am thinking of when a tablet is in a vehicle, mounted and always plugged in.
Whether GPS stays on depends on the Application.
GPS accuracy is not dependent whether power source is plugged in or not.
(But some application could decide to switch off GPS if battery is under a specifc threshold)
Technically there is no half power GPS chip mode.
The GPS chip always uses the power it needs.