Smart battery chargers.

[Snewt1]

Noco for the win...

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[Comanche]

I use a Noco Genius charger. It has worked well. I bought it to replace a battery tender Jr. That started acting wonky. The Jr didn't seem to stop charging when the battery was fully charged. The noco charges lead acid, agm and lithium, 12 or 6 volt.

Yeah I’ve used battery tenders for trickle charging over the years and liked them but I have seen a lot of reviews on the NOCO and it sounds like they’re
Popular and can charge a battery from as low as 1V.
That’s pretty Impressive.

I saw a dude on YouTube that said he ran his rv battery down to 1V on purpose and was able to charge it back to 12.4 V within 40 min with a battery tender JR 800 millivolt.
That’s gotta be total bs.
Ive had a large lead acid charging for 24 hrs on mine and it’s only at 12.2 from 6.2V to start with.

 

[Granite3]

Might have had an AGM battery, those charge 5 times faster than a lead acid battery.

 

[rbstern]

I've had the Schumacher SSC-1000A for about 4 years now. It's a digital 2/6/10 amp charger that handles lead acid, gel and agm batteries. Have used it for many different applications. It's salvaged a couple of batteries for me that seemed like they weren't going to take a charge. I also keep an old, transformer-type charger with a 100A boost mode, for jump starting.

 

[Comanche]

Heres a good review from a seriously nerdy dude.

 

[Nuke And Juke]

So I have a VMAX 100ah AGM setup for solar. I never heard of AGM charger until i found someone on a forum raving about their charger so I got one. Let me just say...totally worth it

https://www.amazon.com/VMAXTANKS-BC8S1220A-Charger-Maintainer-Batteries/dp/B07NBWFGTY/ref=asc_df_B07NBWFGTY/?tag=hyprod-20&linkCode=df0&hvadid=532546161982&hvpos=&hvnetw=g&hvrand=15558611564571337979&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9010944&hvtargid=pla-1432339521523&psc=1