Why Battery is not charging fully?

Hi,

My incredible S doesn’t charge fully, max can charge 47% only, after that there is no improvement keep showing amper indication only, I have tried with 3 ROM but result is same. Then I have changed battery still same, I tried in different way to charge my batteries fully (2 x new battery) then insert in, still result is same. Someone please help me what could be the problem? Why phone doesn’t charge/show to 100% and not turn it to Green. Is phone main board problem? Or better change the phone? I am totally struggle with this phone. I suspect power IC is a problem. what is the solution for it?