There's only one 12V battery. It's in the trunk in the wheel well on the right side. It's a standard lead-acid type. I tried looking up information in this battery using the model # off the battery and did not get any hits. If I had to replace it, I might be tempted to use a deep cycle battery of the same dimensions.

But first things first, check the terminals for a loose connection! It may be that simple.

It gets late early out there. - Yogi