Motor tuning and battery matching
These are two things that I have some questions about. I noticed a tool for motors that looked like a small maching tool to use on electric motors. It looked like it was being used for some onroad cars. Is this something normally done for offroad electrics too? What exactly does this do for performance of the motor?
The next thing is building your own batteries using matched cells. What is the nature of cell "matching", and what specs are used to measure the output of these batteries under a load? Are packs being build out of nickle metal hydride batts. now ?