Hey I just bought a used PSP Go, and I noticed that the battery life is odd. After I charge it overnight, I take it out and play it, and GPSP says its at 60% or 30% after like 30 minutes. Is this normal? I know there is no EXACT battery life for the Go, but I would like to know if there is a way to find the exact battery life it has, maybe via plugin or something like that? Thanks!