Forum Discussion

BFL13's avatar
BFL13
Explorer II
Jun 04, 2020

How Can You Tell if an AGM is Really "Deep Cycle"?

We know about marine/RV batts being not so good at that compared with "real" deep- cycle batts like T-105 6v or T-1275 12v batts. I am suspicious that AGM "deep cycle" batts might be more like mari...
pianotuna's avatar
pianotuna
Nomad III
Jun 04, 2020
Lead-calcium are a starter battery--but ymmv. The calcium reduces gassing, and replaces antimony, to reduce corrosion.

I managed 9 years from marine batteries from Walmart. I think that was so because I had 875 amp-hours of them.

If I were full time, I'd be replacing the telecom jars (they were not new), with the SiO2 I mentioned above.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,344 PostsLatest Activity: Dec 26, 2025