got a steal today, picked up a slim in vvg condition with ffx 8gb card and 3.60 for 60 canadian, which is like around 47 us. The only thing is, it didnt come with a charger. The charging light wouldnt turn off when at max charge(used a 50cent charging cable from pc usb), but im 3/4 way done the charge and its at 3 hours ingame time, on brightness 4/5 and volume 60%. The thing hasnt been used for a long time it had dust on it. So I think its gonna last like 4 hours max on a charge, does that seem a little low? should I be looking to replace the battery?