I assume if he is upgrading to 8 cell he is getting one of the 1200 or 1400 mAh packs commonly available. The voltage on an 8 cell made from individual 2400 NiMHs and an 8 cell 1400 mAh will be the same. he current delivery - discharge rate actually I expect to be a little better on the 1400 mAh because of the types of batteries used. I doubt then the battery is the result of his motor problem.
Unfortunately, I would have to have the motor in my hands to figure out the issue.
Steve
AOL Screen Name: SteveR1960 buzz me if you want to chat RC
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