Your device measures its own silicon.
- Optimize CPU: leave it charging ~90 min and it maps your chip's own safe minimum voltage under worst-case load; the governor uses it permanently. Up to 20% less CPU power at the same clocks, ~4C cooler, same frame rates. Can't brick (voltages are runtime-only).
- Quicksave haptic: hold POWER to shut down and the device buzzes the moment your quicksave commits.
Copy MinUI.zip to the card root to update.