Home Green Accessories Guide How can I check that my ni-mh batteries are overcharged?

How can I check that my ni-mh batteries are overcharged?

I was recently charging my ni-mh batteries. After three hours when I came back it was still charging. I was not able to find whether the ni-mh batteries were fully charged or not. Or they were overcharged. So, I want help from you guys out there who know stuff like this. Is it possible for me to check whether my ni-mh batteries are overcharged or not? Are there different kind of chargers in the market which can tell us about it or even stop charging after the batteries are fully charged? Thanks.