Hello,
I just received 2 used Valence 12V batteries. I top balanced them in parallel to 14.6 V. A couple days later they were down to about 13.8 V. I tested voltage again right before connecting. One was 13.87 V and the other was 13.88 V. When I connect them in series to get 24V, an enormous spark occurs on the last connection. I have one battery terminal slightly damaged now with black soot around it.
This happened twice and then I stopped.
I am doing the same procedure I just did with my AGM batteries just a few days ago.
Can anyone suggest why this could be happening on a basic series connection? I would really appreciate it.
Thank you.
I just received 2 used Valence 12V batteries. I top balanced them in parallel to 14.6 V. A couple days later they were down to about 13.8 V. I tested voltage again right before connecting. One was 13.87 V and the other was 13.88 V. When I connect them in series to get 24V, an enormous spark occurs on the last connection. I have one battery terminal slightly damaged now with black soot around it.
This happened twice and then I stopped.
I am doing the same procedure I just did with my AGM batteries just a few days ago.
Can anyone suggest why this could be happening on a basic series connection? I would really appreciate it.
Thank you.