I have a HP G61 laptop running windows 7. About 4 months ago I started having issues with the battery indicator not displaying the correct remaining percentage. Sometimes it will say something like 52% remaining and a few minutes later saying 95% remaining. When this issue happens most of the time the battery wont charge right either, for example it once was at 20% remaining but my computer shut down on me. So I plugged it in and within 30 minutes it stopped charging like it was full. So I turned it on and it said 100% for a few minutes until it dropped to 35%. So my question is what is going on because sometimes everything works just fine like a normal laptop then next time I have this issue with the indicator and charging. Please help