People often ask us how did we get our 100+ pound shell to spin up so quickly, 2-4 seconds depending on the wheel traction on the floor. The answer is we have found batteries that are almost unlimited in the amount of current that they can source safely, coupled with a custom spin controller the we developed with the MaxAmp batteries in mind. We used a contactors to spin the Shell, but the power from the batteries were so great it caused the contactors to weld shut on a number of occasions. We needed a spin controller than can output the kind of Amp these batteries could put output. We could not find one on the market that would do what we needed so we developed our own. So you can say the MaxAmp batteries fueled the technological advancements we needed to improve our robots.