CTEK D250S Dual

[the evil twin]

Thanks. I need a new battery. I can get 105AH Supercharge deep cycle for the third of the price of a full river of the same size. Only because I have an account with Supercharge... Is the Full River that much better? Does the full river handle the drain a lot better than the Supercharge? Or what makes the FullRivers so good? Or should I look at something else?

I wouldn't rate Fullriver (Chinnee) 3 times better than Supercharge (Phillipino?).
Better, yes but not 3 times as much ameliorated over time for a reccy user.
I have gotten excellent results from Full River over the years in Industrial applications (and my camper ones are nearly 6 years old now) and reasonable results from Supercharge in vehicles but I now feel CAT are better as a cranker

Battery quality pretty much comes down to Material purity,Plate thickness, Seperator quality and construction.
Battery longevity pretty much comes down to the user choosing the right spec and doing the right thing.

Fullriver have an excellent rep and make an enormous array of batteries and did cop an unfair rap a while back when people were putting their Standby Industrial Deep Cycle batteries (max temp rating of 55 deg) under the bonnet as Aux's and cooking them.
The industrial batteries were cheaper than vehicle rated ones so people were not looking past the price for suitability then howling they were duds meanwhile the vehicle batts of same capacity etc were going gangbusters.

Bottom line - I'd buy the Supercharge in your case, if it was going in one of my remote telemetry stations in Wheredpukisthat in remote WA maybe not.