One problem I ran into with a power panel powered glo clip was under certain conditions when the starter is engaged the power to the plug is reduced and the engine won't start. I would turn up the power to the plug and then when you release the starter switch the increased power to the plug will burn it out.This happens when the field box battery is low. Granted this seldom happens, but when it does it will get your attention. I once used up a whole card of glo-plugs before I figured out what was going on. Also the power drain from the starter will usually diminish the efficiency of the glo-plug and make starting harder.I do not like to use the same bat for the starter as the glo-plug.