20-Amp Lifepo4 Lithium AGM Gel Smart Battery Charger, 12V/20A 24V/10A Trickle Charger, Maintainer for car Boat Motorcycle, Lawn Mower

The product is small and lightweight. It is very easy to use and works great. Works with lead, lithium and LiFePo4 batteries and has a repair indicator. 12v/24v compatible. Instructions for how long it should take for the battery to charge.The only thing I'd like is a storage box to come with it.

I've had this for about a week and have used it on both a 35AH AGM battery and a 50AH Lifepo4 battery. It worked flawlessly on both batteries. I particularly like the fact that you can choose the both the type of battery (including lifepo4) and also the charge rate.I also have a NOCO10 charger (which is not inexpensive) and with it I can only change to lithium, which is supposed to include lifepo4 batteries. I am unable to select charge rate on the NOCO10. The charge rate is determined by the software within the charger. The actual charge rate with the NOCO10 on my 50AH Lifepo4 battery was rarely higher than 3.5A, which meant that if I was down 40A it took a long time to charge the battery.The Lifepo4 battery that I have says that it can be charged with up to 10A. By selecting the mid-range charging (10A) on this charger I was getting 9.9A when charging the Lifepo4 50AH. It cut down the charging time dramatically. If I am in no hurry to get the battery charged I could always select the lower charge rate of 5A if I want to do so, which actually charges art 4.9A.I'm very happy with this charger so far but I cannot comment on the lifespan or long term use of this charger due to the fact that I have had it a short time and have only used it twice thus far.

I bought the wrong charge and was stuck on the lake with a dead battery. Bought this charger. Within 6 hours it was fully charged. It is a bit noisy, but anything with a fan usually is. Love all the settings and easy to read screen. Great price, great product.

I bought two of these units on a leap of faith that they would perform according to their spec. Well, the important stuff does! Here's what I like about the 20 AMP PRO MAX units that I bought:1. It does a good job of charging a LiFePo battery bank to 14.4 volts as needed.2. It automatically detects the battery type. Didn't think I'd like this but it seems to do what it's supposed to do.3. It REMEMBERS it's settings if it loses power and resumes operation when power is restored. This is a HUGE benefit and really a necessity in my situation. The cheaper competitor unit I bought is being returned because it couldn't do this.Now for the "cons".1. Although it's set for an LiFePo battery, it never put out a full 20 amps of current. It folded back to 16 amps for most of the charge cycle and then cycled at lower currents at nearly full charge.Since the LiFePo batteries have built-in over-current and over-charging features in the form of a BMS unit, I wasn't concerned about the "nearly charged" behavior, but I am disappointed in the charger failing to provide maximum current at lower voltage readings. In fact, unless needed to protect the charger itself, I see no reason for it to limit output current on an LiFePo setting EVER. As I said; The built-in BMS handles this on that type of battery. So I'm dinging them one star because otherwise everything seems to work well and (almost) fits my needs.UPDATE on 8-2-2024OK; I've had two of these for a while now. I use them to provide backup power and refresh of a battery backup system that has three 200AH LiFePo batteries tied in parallel. It's for electronics backup power so it acts like a large UPS or if you prefer; a "stationary" RV application.So the problem is; the charger kept the batteries at 14.4v most of the time. Then it reported "FULL one day and I decided to see what would happen as the system discharged. Well; the system discharged completely and the charger never resumed charging on it's own. This is a huge disappointment.Now; the units seem to want to treat the LiFePo as a lead acid and it shows "FULL again at about 13.6v.I really wanted to like these and I was going to buy more but, I don't think the algorithm for "automatically" determining the battery type is reliable.

Outstanding. I use this mostly to recharge my LiFePO4 battery that I use for camping and pretty much all things outdoors to include on my camper. Charges my battery efficiently and fast. I have also used this on led batteries and works great. And I have used this on repair mode for a battery I had sitting around and believe it or not it actually worked and I was able to put that battery back to good use. Definitely reccomend this charger if you're looking for one.

I bought two of these and both were returned for the same problems! It charged a LiPO4 100AH battery fine (and turned off the terribly noisy fan upon completion) but then when the battery was discharged to 60% charged, it still falsely reported a FULL charge even though the voltage was now only a little over 12 volts instead of 13.97 volts. It’s a dumb charger that can’t measure a discharged battery after charging and incorrectly reports it as fully charged. The charger never restarted to charge a discharged battery. The battery was fully discharged and the charger still showed that it was at full charged and just sat there until I removed and reconnected the AC cord to restart it. Then it powered with the wrong type of battery selected and had to be manually reprogrammed to the lithium battery setting. This is dangerous and a really dumb “smart charger”!!The next problem is that both chargers radiated VERY strong RF noise all across the radio spectrum. One can’t use a charger that blocks reception of all HF signals with extremely strong interference. Simple and effective noise filtering / shielding could have eliminated this problem, but it’s just plain dumb to market strong noise radiators! The F.C.C. has restrictions on such unintentional radiators of strong noise for a reason and this defect was not disclosed in their technical specs.The last issue is that the fans are extremely LOUD and could be heard quite clearly next door. This might be okay in a garage setting but such loud noise levels should have been disclosed in the specs. To fail such a disclosure is just plain dumb!