That is, the ‘always on’ feature of the Android OS is not necessary when you’re asleep and when your screen is not on.
Following two coolest features of JuiceDefender lets you save and extend battery power of your device.
1. Night schedule (available only with UltimateJuice): This feature disables APN/WiFi during night time. You can also optionally put the phone in Silent Mode.
2. Screen: This feature enables APN/WiFi while the screen is on to allow surfing or tweeting regardless of scheduled events and battery level.