Alpha has blew both the Sanyo 2400nicads and GP3700 NiMhs, the 3000nicads (Botpacks) although can handle it but weigh too much so i can only run at 12v (not 14.4v) for comps. Im looking into these lithium cells but as i only run 14.4v (or maybe 13.2 or 16.5 for these) maybe its worth me taking a different route rather then using a modded Dewalt 36v pack.