Overclocking Undervolting Tool for Motorola Defy. Save Akku Power and set CPU Scaling to minimum while Screen is Off. Set Scaling to maximum on incomming phonecall. Set Scaling to Medium on Low Battery. With SetVsel you can set Vsel OnDemand or Performance. It include a stability test to ensure you settings are stable. Need. Root. Version 1. 11. Maybe 2.