Attach that cable to the negative terminal on battery number two. By connecting two 12v adapters you can achieve the 24 volts of current you need without the extra cost.
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How to connect 2 12v batteries to make 24v. Its important to make sure you that your work space in clean and clear and free of any flammable materials like alcohol gasoline or other simple household items like flammable cleaning solutions as well. How to make a 12 volt battery 24 volts. 24 volt battery learn how to connect two 12 volt batteries to make one 24 volt battery unit. Some larger trolling motors will require 36 volts by connecting together 3 deep cycle 12 volt batteries in series. Connect the batterys positive terminal to the positive terminal power lead of an electrical device with a battery cable. The total voltage for the series connection will be 24 volts.
Connect the batterys negative terminal to the electrical devices negative terminal ground connection with another electrical cable. You will be connecting the two adapters in series which combines the voltage of the two adapters into the total of both without increasing the amperage. This supplies more cranking power than even two 12 volt batteries wired in parallel. Two 12v batteries connected in series the total voltage is 24v. Each battery you connect in series increases the voltage of the battery bank. Connect the other end to the negative terminal of the second 12 volt battery.
Connect one of the battery cables to the positive terminal on battery number one. Connecting batteries in series means connecting the terminal of the first battery to the terminal of the next battery. Use the second battery cable to connect the negative terminal on battery number one to the positive terminal on battery number two. This is a common application needed to supply power to a trolling motor requiring 24 volts. Connect the positive terminal of one battery to the negative terminal of the other battery see illustration. You now have two batteries connected in series.
Connect one battery cable to the positive terminal of one of your 12 volt batteries. Here are a few examples.
Gallery of How To Connect 2 12v Batteries To Make 24v
