The optima battery are re-portability more durable although not everyone finds that to be true. Their AMP Hour rating is considerably less than many of the larger wet-cell batteries although their are a lot of variables in methods of that rating.
Info from their website
https://www.optimabatteries.com/en-u...e-and-starting
Model:
D34M
Weight: 43.5 lb
C20 Capacity:55 Ah
Post Type: dual SAE & 5/16 Stainless Stud
CCA:750 Amp
Width:6.88 in
Length:10.06 in
Height:7.94 in
A note about AGM batteries. No magic there. They are a lead acid battery but using a different construction technology. Here is a good article about them. Lead content is the key ingredient. Note the difference in weight between the two types. That will give you an idea. They excel in several ways but not all.
https://www.solar-electric.com/learn...echnology.html
Personally if you are going to spend $500 on 2 of them you might want to investigate Lithium battery technology. Many high end RVs are going that route.
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