One of my 7921G phone has an extended life battery. The battery is fully charged but dies after 1 hour of use. The battery icon on the LCD shows yellow at 25%. I have switched the battery to another working phone and it shows 100% charge. I have also reset to factory setting and this did not resolve the issue. I know it is not a battery issue and will like to know if the phone is defective or if there is a fix to be done. The 1 year warranty is up and the user does not want to pay for a new phone.