As others have said - anything under 12v and the battery requires a serious “charger” NOT a maintainer - the latter simply can’t do what the battery needs at that point.
A charger will offer 6+ amps, whereas a maintainer offers .75 - 3 amps .....once a battery is discharged below a certain point, in many cases either,
A) the battery will require extraordinary measures to revive (google search for reviving a discharged auto battery)
B) the battery is beyond reviving and must be replaced
The last 3 automotive batteries I had die, came with zero warning - one day no issues, no problems, and no failure indications of any kind, and the next day = paper weight.
My experience in automotive batteries over the last 10 years, including AGM and lead acid batteries is this - if you get 4 years out of a battery, anything more than that is bonus time. If a battery is subject to any sort of parasitic drain (car alarm, stereo, accessory bleed off, or if it is going to sit for days or weeks, etc....) it had better be on a quality battery tender or maintainer.
On the subject of a new battery, my suggestion is to go to your nearest Costco and buy their Interstate brand battery for your Ram, or for that matter, the retailer of your liking - save the extra money you might have spent on a Gee whiz AGM battery. I have been running AGM batteries in my motorcycles for years, and will continue to, but, with car/truck batteries, my car/truck batteries have had the exact same lifespan, 4-5 years tops, with AGM and the old fashioned lead acid bath batteries......and AGM batteries for cars/trucks cost 30-30% more $$$.
Here’s hoping you didn’t accidentally break anything with the ignition or the key fob.
