Fried Batts
Steevo,
Batteries, when in good condition, usually accept 5-12% more charge than their rated capacity. And when discharged at a high rate (20-30 amps), it gives 5-10% less than rated capacity unless you are using top of the line matched cells. What probably caused your batteries to fry was too high a setting for voltage drop detection also called millivolts cutoff. NiMH batts are very sensitive to this while NiCds are less so as stated in the previous post. Hope this helps.
Jedi