Best battery for dual battery

[Turner Family Adventures]

OLB gang, I have installed a dual battery system for my 2015 Tacoma. I am looking at batteries and wanted to know which batteries are good for a second battery? I know as much as get a group 31 type battery and that's about it. What are your experiences with batteries and which are good options and which are not. Thanks!

 

[KonzaLander]

I am running two AGM batteries from Advance Auto. Not a matched pair, but a pair with matched chemistry. My only recommendation is to buy the highest capacity AGM battery that fits where it needs to go and fits your budget.

 

[Turner Family Adventures]

how are your battery's wired? do you have an isolater or they hooked up parallel?
if parallel you should get 2 new batts of the same kind. if you have an isolater in there, run whatever you want.
in parallel putting a new batt against an old one, the new one will always compensate for the old one and cause it to run hot or overheat.
i have dual batts in my truck, parallel wired with a shut-off on 1 batt for when the camper is on.
and i currently need new batts myself.
had Optima's on there, normal service (8yrs), but super expensive (need 2...)
last time i just used 2 wallymart rv/marine batts and i got 9 yrs out of them.
for that length of service and price, you know where my new batts are coming from, don't need to drop huge bucks on a supercalifragilistic brand, horribly overpriced when i can get the same or better life for cheaper

Thanks! I have a national Luna power pack. It has all the isolaters/solenoids built in. I wondered if I could get a new battery for it and keep my old battery for the truck or would I have to get 2 new batteries that matched.

 

[NWoverlander]

I am running dual odyssey batteries (both fit in stock battery space) with a Kodiak control system. Works amazingly well with my 110 w solar panels and dometic fridge.