Sony Ericsson S710A Troubleshooting
Battery does not hold a full charge. If you have had your battery for over 2 years and the usage time continues to drop, you should consider replacing the battery. See the Battery Installation Guide. A suggestion for sustaining battery life is to avoid overcharging the battery. Only charge the battery when necessary (about 10% charge left). If the battery replacement does not return the battery to a normal level, the motherboard should be checked for any issue if possible....