Our 12 volt 1.0 amp battery charger for Kid Trax ride-on toys is compatible with the KidTrax models using the 12 Volt 10 Ah Battery with 2-Wire Harness & 1" Blue Grid Connector.. The nominal 1" blue grid is a style of electrical connector with a 24 mm wide flat plastic plug instead of the more familiar round coaxial or red square-end connectors. This results in a strong and jiggle-proof connection that is easy to remove and replace. Note: This 12 volt battery charger is not compatible with Kid Trax models that use a 6 volt battery system. If you have a 6 volt Kid Trax ride-on you would require the 6 Volt Battery Charger for Kid Trax Ride-On Toys. In addition, the blue grid connector is visually very similar to but not interchangeable with the larger blue Anderson connector. Please refer to the specifications to determine whether your 12 volt Kid Trax ride-on uses this style connector.