Okay, so here's my deal. I've got a "dumb" charger that was meant for a 7.2v 1500mAh NiMh 6 cell battery and I was given two 7.2v 2000mAh NiMh 6 cell batteries.
Please tell me if my logic is correct/incorrect: If the 1500mAh Battery takes 6 hours to charge, then the 2000mAh (having 1/3 more capacity) should be charged for 8 hours.
Alright, I've also got a 4 hour quick charger designed for a 9.6 volt 1800mAh 9 cell NiMh battery; any way to work out how long I would have to charge the same 2000mAh stick then?
Note that the above statement of mine regarding the safety of charging NiMH's only applies when charging is relatively slow (>~ 10 hours).
So if you use the quick charger then do the calculation with the amperage like before and set an alarm clock. Also if you have a multimeter you may want to monitor the voltage of the cell once in a while.
Also recently upgraded my external batter because I can't find the charger for my old one that didn't use micro USB.