I've used the odyssey pc925 in a couple of cars now with larger electrical drains. Its a decent compromise, about 25lbs, with almost normal battery crank and reserve power. Much less finicky than lithium , and can take deep discharges and come back with a recharge. Current one in the autox car is at about 5yrs old.
Edit - these are very popular with the sxs crowd, so lots of nice mounts are available for them.
I’ve been running mine for 3 years now. No issues. But track only car. Now that I don’t have a car to put it in, I use it to power the macerator I use to empty my trailer tanks at the houseAny of you running this, reliable, longevity on track?
That generation does appear to have issues with the mustang charging system. The ATX batteries have more protections built in and play better with Ford's battery charging system. No issues from anyone using the ATX-20/30 from anyone I've seenI was using an Antigravity YTX12-24 in a Morris Engineering amount. The whole set up weighs about 5 lbs but I went back to the factory tray and a Napa battery. The Antigravity batteries are pretty expensive and I was replacing them every 12-18 months. The lithium cells would start swelling. I believe the charging system in the Mustang is not friendly to the lithium batteries. I believe it charges too fast or too much. I am not racing and weight isn't that big of an issue. I liked the compare size since I was able to work on that side of the engine bay without having to remove the battery and tray.
Deep cycle batteries are not the best for starting batteries. They're meant more for stuff like RV lighting, electric trolling motors, etc. Stuff where there's a relatively low draw over a long period of time.
Funny , after I posted that I looked at it compared to my oem battery for the GT500. The lead acid stock size battery for the S550 weighs 26.5lbs and has more CCA and reserve power than the oddysey pc925. Never would have guessed it.Hmm, I might give this one a try. Weight AND cost are my main goals, at about 25lbs with long life that's reasonable. I assume you're on a trickle charger when now in use for days/weeks?