Blurb from the instructions.. "The Zero DeltaV Technology is designed to allow for high rate, 6.5A fast charge without adverse heating
of the NiMH battery"
I am new to the hobby so I didn't know how to guage 'adverse heating' , or what kind of margin of error to expect from the charger. (other people have given the charger a favorable review).
Thanks for the advice/comments, I'll check the temp next time so I'll have a point of reference.