I did a deep dive on this subject this spring. For AGM, Odyssey & Northstar/X2 Power from Batteries Plus (rebranded Northstar) seem to be the top of the heap. The X2 Power has a 5 year warranty which is tough to beat. For a wet battery it's hard to top Interstate at Costco. 42mo warranty & most batteries Best dual battery setup I've seen in a Pathfinder goes to [mention=1343]XPLORx4[/mention] https://xplorx4.shutterfly.com/437 Another http://forum.expeditionportal.com/threads/167538-Dual-battery-on-R50-Pathy-with-VQ35 I would advise against Optima. I was an Optima fan & have owned 3 (1 red top & 2 yellow tops). My red top was purchased 3/27/04 & I think it might still be going today (I gave it to my brother about 3 years ago). My 2nd Optima Yellow Top was purchased to replace the Red Top (it still worked I just wanted a deep cycle battery since I was running alot of accessory power). It lasted 8yrs (11/20/09-11/2017). My third was purchased after Johnson Controls bought the company & moved production to Mexico. I bought it for my wife's MDX because I felt the OEM battery didn't do a good job with all the electonics drain I would get while simply cleaning the car. It did improve that but it only lasted 3yr 10mo (1/2015 - 11/2018). I just replaced it with an Interstate. Battery Yellow Top Odyssey Northstar X2 Power Group 34/78 / 75-25 25 / 34 / 34/78 27 27 34/78 PHCA 1400 / - / 1500 1750 1500 CCA 750 / 620 850 / 792 / 850 930 930 880@0*F/585@-20*F CA 870 / 775 990 / - / 1250 1080 1050@32*F Ah 55(120AH)/- 65 / - / 68 92 90 68/64@20*, 61@10* Reserve 120” / 100” 130”/ - / 135” 195” 133" Weight (#) / 38.81 50 / 46.6 / 49.5 68 69.75 48/50#(26.2kg) Length (") 10 1/16 / 9 1/16 9.46 / 10 1/4 / 10.86 12.44 12.46 10.87/10.9"(276mm) Width (") 6 13/16 / 7 1/16 6.84 / 6 13/16 / 7.09 6.77 6.77 6.99"/7.01"(178mm) Height (") 7 7/8 / 7 5/16 8.69 / 7 7/8 / 7.88 8.86 8.75 7.76"(197mm) Warranty (yr) 3 / 3 4 / 3 / 3 4 5 5 (4 if Northstar) Cost 282 / 272 290 / - / $262+t=289.18 350 330 300