Originally Posted by Cometstorm
I’m no exprert, but I think it’s a “vintage Mopar vs. modern Mopar thing.”

Vintage Mopar, I suspect can do well without a tender while in winter storage.

Modern Mopars have a continual micro battery drain due to all the advanced micro circuits and such.

A good tender on such will keep it topped off, so to speak.

It’s the “up / down” storage charge factors that are very hard on their batteries.

My 2020 Challenger Scat Pack is stored in a drywall insulated garage, which is house attached.

It’s on a Deltran 1.25 amp tender for the winter.

Battery Tender Plus 12V Battery Charger and Maintainer: 1.25 AMP Powersport Battery Charger and Maintainer for Motorcycles, ATVs, UTVs - Smart 12 Volt Automatic Float Charger - 021-0128 https://a.co/d/ec44JJn



Same I use, never an issue

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8