Maximum battery physical dimensions.
The current battery (Motorcraft BXT-59) seems pretty small, physically. The box it sits in has a large gap all around the battery. The top says 540CCA, which seems kind of wimpy to me.
I was wondering what the largest size battery I can fit in, physically. I have been reading about different "group sizes" but I am more confused now than when I started. I am not planning to replace it soon, but the info would be nice to know down the road.
The truck did sit on the lot for 6 months with (I assume) no driving, since I got it with 6 miles, so I have no idea if it has been damaged. So far it works fine although I think it should start up more forcefully. My wife's Escape with the original (very small) OEM battery seems "snappier" when starting. I have no idea what size her battery is.
Thanks!
Group 59:

Group 65:

The larger battery also has the advantage of having removable cell caps, so you can add water if necessary. Some people aren't into that but I am.
From the reading I have done, Interstate is the ticket for batteries. I think Motorcraft batteries are made by the same parent company. In the same size the Motorcraft batteries are rated a bit lower.
I used to live up north, which is why the Group 59 battery struck me as a bit inadequate. But down here I bet it would have been fine.
I bet Ford sends different batteries to different regions. Like my F150 doesn't have an engine oil heater thingie and I bet yours does.
I sold the OEM battery for $40 so my out of pocket was $60. The dealer wanted a lot more for some upgrade package that included a more powerful alternator. I figured it would be cheaper to do it myself, and I can't picture needing a more powerful alternator with as little as I have running.
I am considering a dual battery system but don't know where the second battery can fit. The optima yellow top appears to be a physically smaller dimension battery.
Any one have a dual battery set up in a 2004 plus 5.4? If so where did you fit the second battery? Photos would be helpful.
Thanks,
RadarRick











