Laying down batteries

[bubbagumper6 5,000+ posts]

AGM batteries and other types of deep cycle batteries can sustain cell damage from high amperage charging. If they should die, you'll need to trickle charge them.

Damn, I didn't know that. I've jumped my Yellowtop a few times in the past and that ish is still kickin, lol.

 

[ejschultz 10+ year member]

From experience, it'll kill them. I jumped mine a few times in the past after letting my car sit for quite some time. This year when I went to start it for the first time, I jumped it and I killed the battery. It started up, ran fine, no voltage issues, but when I shut off my car, the battery was making a crackling sound. I just about shit my pants. I removed that battery faster than I thought possible to remove a battery from a car and put it outside my garage, just in case it decided to blow up or something. I know the odds of that aren't really too good, but I wasn't taking any chances. I got the battery replaced under my free 2 year replacement guarantee. It was definitely a learning experience. I guess you could jump it, just don't rev the other vehicle, let it idle and slowly charge up the battery. They're meant to be slow charged or trickle charged. I have a charger that does a 2 amp trickle charge. However, I made the mistake of "75 amp quick charge"-ing mine. I didn't feel like waiting. That could have been an expensive mishap.