[MENTION=98328]zebede[/MENTION], when your speed goes down to some slow speed or you stop, does it stop putting out power? Some devices shut off when they stop receiving power. If this charger doesn't have a cache battery, it would be a problem for some people, but I suppose you could get around it by having the charger's output go into a battery and then powering (or charging) the appliance with the battery rather than this charger.