You will need
- Phone battery, power supply with adjustable current,voltage and indicators rheostat.
There are several ways to restore batteries phone. The most affordable of them "treatment" of the battery by increasing the voltage.To do this, connect a voltmeter and load parallel to the battery and discharge it to 1 V. thus carefully monitor your voltage should not drop below 0.9 V. Periodically check the temperature - it should not rise above 50 degrees, if this occurs, disconnect the load until the battery has cooled to room temperature. Further, after the discharge to the desired value, wait for the normalization of processes in the element. It will take approximately 10-15 minutes.
Connect the ammeter in series to the battery of the phone, and voltmeter and power source in parallel, one contact to the battery terminal, the other to the free contact of the installed ammeter. Then tightly attach the battery temperature sensor or thermostat. For more accurate readings can use the thermal compound. Install the voltage regulator is connected to a power supply the minimum voltage and begin to smoothly raise the voltage to amperage on the device reached a value of one tenth of the full capacity of the battery. For example, for a battery capacity of 1200 mA, the maximum value will force current to 120 mA.
The lower the current, gradually increase the voltage. First once in 5 minutes after the hour every hour. After reaching a voltage of 1.5 V, stop increasing and keep the battery charged. After the amperage will drop to almost zero (approximately 4-6 hours), unplug the charger and wait for 20-25 minutes, until all the processes in the battery are normalized. After that, fully charge the battery. To achieve good results, it is necessary to carry out this operation 2-3 times.
For the stabilization of battery life on a single charge, repeat the steps every six months.