AGM Battery Plate Thickness (A Link)

I did notice one thing in the earlier clicky article concerning AGM batteries that was not emphasized - only maybe hinted at.

The article mentioned the low internal resistance of AGM batteries so that more current could be dumped into them when charging with little concern for battery over-heating (...if one has a charger that can maintain the necessary voltage while simultaneously supplying the high current).

However there is another advantage from AGM batteries having low internal resistance. They will charge faster - than wet cell lead acid batteries - at any applied charging voltage above their intrinsic rest voltage. This means that even the lowly stock RV converter will pump more current into discharged AGM batteries than a converter will with discharged wet cell batteries.

Our AGM batteries have seen almost entirely only converter charging and engine alternator charging over their nearly 9 year life.

I tried to email Crown Battery. Their email link apparently works as good as email links to Mexican companies. But a phone call to them would be worth a bushel of Hard Red Winter Saskatchewan wheat to see if their L-16 plates really are .220". My Rolls batteries have (originally) .335" plates. .145" is barely thicker than old fashioned GC flooded batteries. .125" is one eighth of an inch. I do not stand in awe of such a dimension in a large case battery.

Make sure the plates have ENVELOPED SEPARATORS no matter what brand you select. Mossing shorts are public enemy No 1 to a VRB battery.

Hi Mex,

Surrette L-16 AGM six volt the plates are only 0.145. I'd love to know where to get 0.220. Trojan are the same thickness.

I did find group 31 plates in a group 27 jar that are purported to be 0.118 (3 mm). This is a 12 volt jar.

The thickness of the Crown plates surprised the heck out of me. The thinness of the Trojan plates also surprised the heck out of me. Geez even the group 31 Lifeline has .105" positive plates.

With equal given quality very thick plates have lots of forgiveness via ablation. Equalize, equalize and equalize. Corrode (electrolysis) and chemical. A good AGM L-16 with .220" plates should easily last 10-15 years of continuous heavy cycling. 25-years would not be unusual. Wow!

Good stuff on the plate thickness of various brands.

lots of good reading there, thanks for the link.

'The Concord AGM's are .115",'

wa8yxm wrote:
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