Hello! My battery meter has been acting odd. It reads 100% and doesnt change. Should I reset the SMC? It has never lasted this long. Earlier today while charging it, it said 0% only so i restarted it and it started to read properly. The little lights on the side wouldn't light up either. Mid-2009 Macbook Pro. 10.7.5. It now says I have almost 6 hours left of battery. This thing lasts 4 hours MAX usually.