Was using my MBP this afternoon and all of a sudden it went to sleep of its own accord. I kept waking it and noticed that the battery status was around 94%, however, it kept going back to sleep within around 10 secs. Also noticed that there was no light on the charger that was connected to mains. The battery status seemed ok but when I unplugged everything and tried to wake it from sleep it was the same. Could this be a dodgy battery? Or charger? Or both maybe? It is strange that the charging light doesn't illuminate at all. It is an early 2007 model. I am hoping it is only a battery that needs replaced. Any suggestions of things to try?