BFSA introduces the B.E.S.T. sensor. The B.E.S.T. (battery electronic sensor technology) sensor is a state of the art electrolyte level sensor. The most user friendly and safest sensor anywhere. The B.E.S.T. sensor is always green when the electrolyte level is OK. When the battery needs water the B.E.S.T. sensor flashes red. It’s that simple Green means go, red means stop.Please watch for more information to be added to our site or call BFSA to get the latest update