For s40 and s60 users!! 1. Turn off your vibration from your profile settings, coz vibration motor strongly affects your battery. 2. Set power saver time out up to 12 seconds in display settings. 3. Charge your mobile up to 3hrs only, use w.r.t mobile charger, don't use china chargers in other words fake chargers. 4. If there is no network in any area, select flight mode in profile, this saves your battery up to 10%. 5. For symbian users turn off keypad light and set your screens brightness to 5. Thats it friends!!! Tip from LevelApp Community!