Raise the voltage to revive your phone's battery. Connect to the battery load, and a voltmeter. The connection must be in accordance with the scheme of parallel connection. Lift the load to a value not exceeding 1V. Follow the temperature and voltage of battery. The temperature should not exceed 50°C, and the voltage should not fall below the level of 0.9 V. as soon As the temperature reaches the designated point, disconnect the voltage and wait until the battery has cooled to room temperature. After discharge to the desired value in the element must occur normalization processes. It will take about 10-15 minutes.
Take the ammeter. You will need to monitor the current entering the battery. Connect it in series. The chain itself should consist of a parallel connected voltmeter, power supply and battery. On the battery install the temperature sensor to control the temperature of the element. To obtain the most accurate readings, it is possible to apply thermal grease.
The voltage regulator will set the minimum value. Then gradually raise it. Watch the readings of the ammeter. The current strength should be about 1/10 of the battery capacity. Ie if the battery has a capacity of 1200 mA, the strength of the current in the current should be 120mA.
At least reduce amperage increase voltage. To restore the phone's battery. first you need to raise the voltage every 5 minutes. After an hour, increase the voltage every hour. After it reaches 1.5 V, stop manipulation and put the battery on charge. Wait until the battery is fully charged. It is desirable to perform these operations at least 2-3 times.
Check the battery of the mobile phone. If the above steps do not yield the desired results, buy a new battery.