Had this problem for about 2-3 years if i remember it right. So my PSP's battery indicator is acting weirdly now. After full charging, i played my PSP for about 2 hours roughly, from 100%, to about 50ish%. So far so good. About 3 hours later (the PSP's in sleep mode since i played), the battery goes up to 70ish%. This is the problem i'm talking about, and it always goes up depends on how much juice it has left, like from 30% to about 40%. Can you guys help me? This is minor problem, but it's pretty annoying. I uses PSP hud plugin if that matters. Should i replace my battery? Honestly i don't know if it will work, but i will try the replacement if there's no other choice left. Or is there some kind of homebrew that can recalibrate the battery, especially on the indicator? Any suggestion is welcome.