Iphone 3gs will only charge on side

[Kat G]

Hi guys, I plugged my phone in via usb to my pc to charge as I have lost the mains plug and usually it will charge, but this week it won't charge unless it is on it's side and even then if I touch the phone or charger it stops charging. I went and bought a brand new mains plug and usb cable but it won't charge the phone at all!

Is it something loose in the phone or could it be the battery?

Help!

 

[bbsadaj]

sounds like it's on the inside, especially since it requires being positional to charge.