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Thanks for all the replies. Good information. Our winters here in Northern Kalifornia are not to cold, be we are thinking about leaving Kalifornia for Idaho. That is why we purchased the Jeep. I agree, when we take a long trip with our pickup pulling our fifth wheel, I will replace both batteries. I don't want to be far from home and have problems. Most of the time when I use the pickup is to go get a sheet of plywood or 2x4's etc. or just to drive it around town, because it is so comfortable and nice to drive.
My 2014 has a larger than normal constant draw and killed my factory batteries when it sat for over a month in the cold, limped them along for a couple years, but recently replaced with X2 powers by Northstar, supposed to be excellent batteries, time will tell. Haven't had many problems with Motorcraft replacements either in many trucks that the body shop guy and I have rebuilt. Probably put 20-30 sets in over a few years with zero issues. Only batteries we had issues with were Centennials, they replaced anything with no questions asked, but had about 6 failures in 10 sets sold, so not great, probably a bad run or something. Have some that have lasted for well over 5 years.
This discussion reminded me to find out exactly what batteries I have in my truck since I haven't looked at the brand since I bought it used a year ago.
I have a Duralast 65-DLG (850 CCA) on the drivers side and a Motorcraft BXT-65-750 (750 CCA) on the passenger side.
About 3 months after I bought the truck I noticed a LOT of corrosion around the Motorcraft terminals and a little bit around the Duralast. I cleaned the terminals and battery connectors thoroughly and applied the felt washers and protectant spray.
So far both look good.
I might consider the O'Reilly brand "Super Start Extreme" (850 CCA) part #65EXT.