Extend battery duration and battery life

Every battery has limited number of recharge times. After time it loses duration. To prevent it wearing-off charge it as little times as possible (but don't just store battery device unused for longer period)

• turn off vibration, vibration eats battery
• decrease screen brightness
• decrease time when screen turns off
• turn off complex wallpapers and themes ( .bmp type wallpapers should use less power than .jpg)
• turn off screensaver
• take pics with no flash (flash eats lots of energy in very short time)
• disable animations and use simple menu
• turn off blutooth & wireless when not needed
• turn off cellphone when not needed (like at night)

Many things that consume battery consume cpu power, so cellphone shall work faster as well. Spot friends that have same phone and latter exchange parts and batteries..