So, it seems the batteries problems had to do with the PSP since I bought another used PSP and the 1400mAh Ostent battery charges when inserted in it. Also, this PSP comes with a battery called Hisewen Battery Pack which is 1500mAH and it also charges. I'll keep both batteries. The problem is that this PSP's screen is a little scratched and the UMD drive spins by itself. It appears my bad luck doesn't end.