got a serious battery problem

[funlove201]

I was using my iPhone as I used to use, the phone showed me the very common message of "Less than 20% battery remaining", and when I plugged the phone into the charger, the battery bar on the top of the screen showed that the phone is fully charged but the battery bar on the main screen showed the red signal of battery, What to do?
I tried resetting all the settings of the phone but it still remained the same!

P.S. :- I'm from India and there are no Apple store in the country!
so please help, I really need it..........

 

[Cubsfan]

I've had this problem a couple of times. For some reason it happens when I plug it into one of the USB jacks of my car stereo. It also happened when I used a 10 foot USB extension cable.

Try using a different way to charge it and see if that helps.