BatteryMINDer 210-AY SmarTECHnology Multiple Battery Charger Connector - To Be Used with BatteryMinder Chargers SMART TECHNOLOGY  Feature SmarTECHnology, an advanced technology made simple to use. SAFE TO USE - Model 210-AY is a simple, safe and affordable way to connect two batteries simultaneously for easy battery maintenance. FOR MULTIPLE BATTERIES - Use in conjunction with BatteryMINDer units designed to maintain multiple batteries. Combine with additional Y-connectors to add even more batteries to capable charger systems. THREE IN-LINE FUSES - Features three in line, replaceable 15 Amp fuses to keep each connection protected against potential short circuits. BULLET CONNECTOR - Each end features an automotive capped SAE "bullet" connector. Combine with additional Y-connectors to add even more batteries to capable charger systems.