My iphone 3gs wont charge please help?

I have an iphone 3gs, it was working fine charging ect. but when the battery fully ran out it stopped charging and wont switch on? it been on charge all night and ive even changed the usb cable, it wont even connect to itunes? please help?

I had this exact same problem with my iPad 1 many many many many times. For some reason or other it takes 3 days to a whole week to fully recharge. Sorry for the inconvenience! It sucks, right?

You can force restart your iPhone. Wait for a while, and then check if the iPhone can charge. Or use an iOS repair tool like TunesKit iOS System Recovery to fix the issue with no data loss. Or you have to change a new battery in Apple store.