BatteryMinder BC2AY Insulated Battery Charger Clips with Y-Connector BatteryMINDer BC2AY A simple, safe and affordable way to connect 2 batteries simultaneously for easy battery maintenance The BC2AY assembly contains insulated 24" battery clip cord set with 10 amp fused qwik-connect plug (BC-AA) paired with 210AY Y-Connector with SmarTECHnology Designed specifically for our Aviation models, the BC2AY can also be used with our other models except for the 28252, 12151, and Onboard Desulfators 12, 24, 36, 48 Never connect two or more batteries together before fully charging each and checking its condition. Failure to fully charge each battery and check its condition can result in a serious safety hazard.