OK, at first I thought it was just the battery but I went and got a brand new battery and the same thing happens I can turn my psp on using the charger and when I put the battery in the orange charging light blinks. I have checked all the contacts and they all touch. Basically my problem is I can run the psp off the charger but not the battery, which defeats the purpose of it being portable. My psp is on firmware 5.50 GEN D3. I'm pretty tech savvy so if it requires taking my psp apart I'll do it, after all I received this psp as a gift Thanks!