Hi,

I have 3G, before this, it had problem where whenever I turn it off, the battery drains faster. e.g. when i switch off, its 100%, when I switch it on back after 2 hours flight, only 50% battery left. Then recently, cant on at all even though I've charged it for 1-2 hours. Do u know what's wrong?

How much if I want to replace 3G battery and 3GS battery COD?