question about brushless motors

If you're running two nimh packs in series, going with a couple of trakpower 4900 lipo packs will get you better runtime and more power. I'd venture a guess and say that you'd get about 20 minutes on a pair of trakpowers, maybe more. If you go to the 8000mAh packs, runtimes really get up there. I've been running the 8Ah packs and I usually get tired of running before the battery goes out.