I hate to burst your bubble, but there is no “Best” battery for your second necessarily. Everyone has there own experiences with different types. This topic is becoming to be the new “whats the best tire” question 🤣 As many think i sound Rude when I say this but IFGAF lol, check out the search up top to get the same opinions your gonna get here once this thread blows up.
Now Ill start it for ya….
My recommendation is good ole AGM batteries. Have had them on my P1 since 16’, changed them once and had them on my TX2 for 2 years. Its all in how much crap “accessories” you put on, how you isolate your amp draw (what stays running all the time) and how you maintain it (float charger) when the machine is at idle (stored)
As for brand, Pic your poison. Tecnically there are only a couple battery manufacturers in the US that put various names on the batteries. As for specific brand, ive had odyssey and mighty max, both have been good and lasted the same , One is just more pricey, so again pic your poison. Here is the link to my currant battery and pics of my float charging system. Good luck to you and do t forget to post pics of your final soliton POIDH.
ML26-12 12V 26AH Sealed 12 Volt DEEP - Cycle Rechargeable Battery
https://www.amazon.com/dp/B00MHNMJWK?tag=sxsweb24-20