These are not a battery designed for repetitive deep cycle application.
The fact that they say so should be respected, as opposed to flowery marketing designed for maximum sales numbers.
If one plans on cycling an AGM battery deeply and often, then get one which at least does not pretend to be made for this application.
A savvy shopper is not going to find a miraculous AGM battery that is resistant to deep cycling and imperfect recharging.
The price of the battery in question is hardly a great deal.
For not much more money one can get a Lifeline AGM battery, and these have no equal in the deep cycle AGM world, when their peculiar recharge needs are met..
It comes down to the battery depleter's ability to meet/approach the battery manufacturer's recommendations as to initial recharge current and absorption voltage.
The best Lead acid battery ever made, chronically undercharged, will not last as long as the worst Lead acid battery ever made properly and promptly and fully recharged after every depletion.
If one wants and plans on meeting or approaching 'ideal' AGM battery recharging, then these expensive batteries can yield exceptional service, but if one expects that these expensive batteries make them immune to improper or incomplete recharging, then they will waste their money.
A shopper with an AGM in mind, is not going to find a magical deal which bypasses the battery requirements.
Everything is a compromise. The cheapest AGM will last just as long as the most expensive AGM when chronically undercharged and it will be disappointing.
A Lifeline/Fullriver/Deka/ Northstar/Odyssey AGM when properly recharged will outlast and outperform an Asian AGM battery like UB battery all factors being equal.
Full river are Asian made but their parent company is Rolls Surrette, and R/S, in the flooded battery world, have No equal. R/S flooded batteries are simply the best wet/flooded batteries in deep cycle applications. Whether their AGM batteries can compare is up for debate.
My opinion..... FR batts are a great AGM battery, but LifeLine is better when recharged properly.
The UB Agm battery just costs less initially. If both the UB battery and the Lifeline AGM battery are treated well,they will give great service, but the Lifeline AGM will deliver 2 or 3x the total cycles, and can recover usable capacity when over discharged via a special charging procedure which would destroy a lesser AGM.
Treated badly/ chronically undercharged both will die at the same age/# of cycles, and the Ub battery will hurt less financially when it fails prematurely.
If price is the deciding factor, then go for the Ub battery.
My main issues with AGm batteries sold online is that they could be a year old when purchased and a 100 AH battery might only have 80AH capacity when bought.
With batteries, you get what you pay for. There is really no way around this. Battery longevity is a direct correlation on how well they are recharged. The best can recover from abuse a lesser battery could not, but the recovery procedure is far outside the abilities of the 99% who need a recovery procedure in the first place.
Saving money on batteries is almost an Oxymoron.
If one cannot or does not care to know what a battery needs to be happy, then get the cheapest and hope for the best.
If one does care, then treating the best battery as best as possible, will yield the best longevity and be cheaper in the long run.
In the AGM world, Lifeline have no equal when recharged properly. Bottom of the barrel are the UB Asian AGM, but these, if properly and promptly recharged to full after every cycle, can also deliver exceptional service.
So my point is, do you know how to treat a battery? Can you treat it properly?
If not, just get the cheapest while you learn how to, and don't get all butt hurt when it 'no longer takes a charge' The fault lies in the mirror, not on the manufacturer label.
