Thank you for the information. My main concern is using my phone without a charger. The only time my phone functions is when the power cord is in, yet the battery is fully charged (as it has reported by saying :"battery is fully charged").... Thank you for the information. My main concern is using my phone without a charger. The only time my phone functions is when the power cord is in, yet the battery is fully charged (as it has reported by saying :"battery is fully charged")....

In this case, the battery is likely to have expired. This results in a significantly reduced capacity. Some batteries have been known to last less than 6 months, some over 2 years.

When they expire, they can seem to charge as normal, charge quicker or sometimes take longer but they will always either discharge very fast or look like they are fully charged until you need to take any significant power from it. They can even last in standby for some considerable time as they can supply low currents but be unable to supply the high 1Amp current I mentioned when you need to make a call. This can result in you having full battery strength on the display but the phone indicating it is almost flat as soon as you make or receive a call.

I can go into more technical waffle about battery capacity, chemistry and internal impedances but I do not want to bore you unless you are interested.

BTW: Cheaper copy batteries can be a false economy as they usually expire quicker and some do not have the same safety valves that are needed to stop them gassing and exploding. In this case, the battery is likely to have expired. This results in a significantly reduced capacity. Some batteries have been known to last less than 6 months, some over 2 years. When they expire, they can seem to charge as normal, charge quicker or sometimes take longer but they will always either discharge very fast or look like they are fully charged until you need to take any significant power from it. They can even last in standby for some considerable time as they can supply low currents but be unable to supply the high 1Amp current I mentioned when you need to make a call. This can result in you having full battery strength on the display but the phone indicating it is almost flat as soon as you make or receive a call. I can go into more technical waffle about battery capacity, chemistry and internal impedances but I do not want to bore you unless you are interested. BTW: Cheaper copy batteries can be a false economy as they usually expire quicker and some do not have the same safety valves that are needed to stop them gassing and exploding.