Now I see where you're coming from. Those are not "charge" plugs. They are balance plugs. Some come with a 6 pin plug while others like my EVO 4900 pack have two plugs -- one is a 2 pin and one is a 4 pin. When plugging into the balancer, you must plug in the four pin plug first, or the charger (at least the one I use) will think it's only a 3 cell pack. I use a Thunder Power 1010c and the 210V balancer.