charging battery

[Semi Crazy]

I don't believe you will reach anywhere near full charge with a 7.6 volt charger on a 12volt battery. It seems to me a nicad charger is different than a nimh charger. I can't tell from the photo which your is. A nicad can handle higher charge rates then a nimh. The nimh should be charged at c1 the nicad can handle up to c10 although if you want a longer battery life stick to the low rate.

Charge rate for a 2000ah nicad battery: 10 - 14 hours
c1 200ma
c3 600ma
c10 2000ma

Charge rate for a 2000ah nimh battery: 10 - 14 hours
c1 200 ma