The tech people at 2dogrc.com spent many months checking out various battery manufacturers before deciding on a supplier who fully met their tough requirements–a high-end battery that they could sell at low end prices. The result is Mad Dog, a series of batteries available from 2-cells up to 6 and mAh all the way up to 5100 and discharge rates from 20C to 35C with a charge rate of 3C. One of the demands 2dogrc.com placed on their supplier was that each pack must contain synchronized cells, meaning matched internal resistance. 2dogrc.com has run over 300 tests on their new Mad Dog packs and are willing to share the results with you. Just visit their website.