You will need
  • Battery, phone, charger for phone.
First discharge the battery to a condition while you generally will not include telephone. To do this, the battery must be in phone. It is better to full charge the batteryand load phone energy-intensive applications. Listen to music, play games or just pressing the button. In the absence of the energy-intensive phone applications also for a full charge very well absorbs the energy on and off the phone. The thing is that when searching for networks, the phone spends a large amount of energy.
When the battery is fully discharged, put the phone on charging. You need to charge to full charge the battery. After the first cycle discharge-charge the battery to restore its capacity is not at the maximum of the possible. For best results, you should repeat this cycle a couple more times. In the future this procedure must be repeated 50-100 recharges phone.