How To Wire Two 12 Volt Batteries Together

This page identifies How To Wire Two 12 Volt Batteries Together and how to charge two 6v batteries. Visit How To Charge two 6v batteries for additional resources and information.
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Mute the speaker Listen to this using a male or female voice M/F 

By G.K. Bayne

There are two methods to connect two 12 volt batteries. The series connection adds the voltage of both 12 volt batteries for a total of 24 volts. In a parallel connection, the voltage remains the same but the overall amperage of both batteries is added together. In other words, if two 250 ampere batteries are connected in parallel, the total...

1

Mute the speaker Listen to this using a male or female voice M/F Make a series connection to the two 12 volt batteries. Attach the positive (+) and negative (-) terminals from each battery together. Use the ½-inch end wrench to tighten the battery cables and clamps to the battery terminal posts.

2

Mute the speaker Listen to this using a male or female voice M/F Connect one of the battery cables to the positive terminal on battery number one. Attach that cable to the negative terminal on battery number two. Use the second battery cable to connect the negative terminal on battery number one to the positive terminal on battery number two. The total voltage for the series connection will be 24 volts.

3

Mute the speaker Listen to this using a male or female voice M/F Make a parallel connection for the two 12 volt batteries. Attach the positive (+) terminals together and the negative (-) terminals together.

4

Mute the speaker Listen to this using a male or female voice M/F Use one battery cable. Connect the two positive terminals on both batteries together. Attach the second battery cable to both negative terminals on the two batteries. The batteries are now in a parallel connection. The voltage remains the same--12 volts--but the amperage is added together.

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