20-Amp Car Battery Charger, 12V/24V Lithium, LiFePO4, Lead Acid (AGM/Gel/SLA), Smart Battery Maintainer, Trickle & Pulse Repair, Portable Charging for Cars, Boats, Motorcycles, Golf Carts, Tractors

I purchased the 20 Amp Lithium Battery Charger primarily for charging my LIFEPO4 battery, and it has exceeded my expectations. Not only does it charge LIFEPO4 efficiently, but it also handles my other battery types, like AGM and SLA, without any issues. A standout feature is its display, which shows the number of amp hours it puts into the battery during charging—an excellent way to monitor progress. However, it loses this information after completing the charge cycle, which is disappointing as I like to see the total amp hours at the end. Despite this minor inconvenience, the charger works flawlessly for my needs, making it a great addition to my toolkit.

I really love this little charger. I have 200Ah lithium, and it works flawlessly in sensing, setting charge phases, and filling up the battery. Super easy to set up too. Seems like it should hold up well, and is worth the price.

Works great works on any tipe of battery very long cords

My new favorite charger. I was skeptical that something so small could push 20 amps, but according to the built in display it regularly hits 16A+. The fan moves a lot of air, but I don't think it's unreasonable for such a small package. I can feel it moving a good bit of heat and it turns off when it's not attached to anything.Main thing I'm happy about is it doesn't do a mandatory 10 minute desulfation/testing cycle at the beginning of every charge like one of my 10A chargers does. Sometimes it doesn't matter but sometimes I want to start charging immediately - I frequently use this to keep a car battery from dying when I need to have key on engine off for an extended period. I appreciate having some control over the charge, something omitted from a lot of "smart" chargers these days. I can also select 5A, 10A, or 20A for 12v batteries which is nice. This is exactly what I was looking for.The only con I can think of is that the charge percentage seems to mean nothing and it usually just flashes 80% or 100% regardless unless a battery is completely dead. I can get a good enough idea by the charge voltage and current so I don't mind that much.Update: I see it sometimes pushing 20A, then back down to about 15-16A when the battery is nowhere near fully charged (and can take 40A+ as verified with another charger). I suspect it's throttling itself when it gets a little too warm and could just use a bigger fan but I haven't spent too much time investigating it. I may try giving it some more air to see if it'll maintain a higher current.Also have been testing the repair feature on a couple batteries with issues and have seen good results. It probably can't bring back a trashed battery, but it does seem to help a weak one. I first tried this feature on a Noco charger and didn't notice much difference, but I think that's because the Nocos will turn it off after ~4-5 hours (which isn't the worst idea especially for routine-ish maintenance), while this one will run until you stop it or it thinks the battery is fixed. How does it decide that? No idea, but it's only stopped itself on one battery that I've used it on so far. I let it repair one for ~9 hours a day for a week straight (under supervision!) and saw improvement from ~300CCA to ~550CCA and holding higher voltage at rest.Last thing. I noticed some reviewers mentioned the cables pulling out of the plug at the charger and exposing bare wires, and yes the first one I bought is developing this issue. I'm watching it closely and will be making a repair or retiring it when it starts to get questionable. I've since bought two more of these and noticed the plug has been updated to prevent this from happening. Also my newer ones modulate the fan speed according to charge current (and temperature I assume), so it seems like they've been upgraded all around.Update again: Changing my rating because after buying a 4th one (yeah I know) this version seems to have gone back a step. Will not attempt to charge batteries below ~7.5v, just sounds of relays clicking (which old ones didn't have) then shuts off and says it's full. I originally said the new version doesn't float and that seems to not be entirely accurate, but it is different than before. I'll be doing some testing on that...

As you know your old charger won't work on the new Lithium tech battery. Recently I got one..and a super simple charger came with it! That charger worked...but it had no readout at all. So, I wanted something finer and after much lookings I chose 20-Amp Car Battery Charger. I have used another brand exclusively for years.... But that one came with bugs. My new 20-Amp Car Battery Charger, so far, has been flawless. Gives good charging info and works QUICK! Also it has some kind of battery rejuv function. Well, I have a truck battery to go to 0 on me. And it wouldn't fully charge. I ran the restore thingy on my new 20-Amp Car Battery Charger on the thing and wah-lah, the old battery is back 100% again. That alone may have saved me a hundred bucks. This is a good charger! Works with all batteries!

As a couple of other reviewers have noted, this charger takes a surprisingly short time to display "FULL." One reviewer did the measurements to determine that it is apparently calibrated to read around .3 volts high, so that it charges batteries to 70-80% of full charge. I can confirm that, based on my experience. (Unfortunately, I didn't read all the reviews before I ordered from Amazon.)I individually charged 3 AGM batteries that were in different degrees of discharge. The % of charge meter on the charger behaved just the same for all 3. In each, after surprisingly short charge times, it read FULL when the batteries were about .4 or .3 volts shy of full charge.Even before I got that far, I had to return the first unit I ordered. It was advertised as "Used, Like New," and when delivered showed signs of hard use, scuffs and dirt everywhere. In that case I complained to the seller and asked how they wanted to handle it. They responded saying I had bought a used unit and payed a used price," sidestepping my complaint to them of false advertising. I wrote a second time pointing that out, and they replied that they had nothing to do with listing it as "Used, Like New," that it was Amazon's fault. This is very unlikely, since this was shipped from the seller's business address, not Amazon.Amazon's good return policy saved my money in both times, but of course I don't get back the time I spent messing with this company and its product.

Great versatile battery charger - gets a full charge on my lithium iron battery i use for my trolling motor.

works well, packed well.