How do you wire two 6 volts for 12 volts?

To wire two 6-volt batteries for 12 volts, connect the positive terminal of the first battery to the negative terminal of the second battery. The remaining open terminals (the negative terminal of the first battery and the positive terminal of the second battery) will serve as the 12-volt output. This series connection effectively adds the voltages of the two batteries together, resulting in a total of 12 volts. Always ensure that both batteries are of the same type and capacity for optimal performance.