ULTRAPOWER 4-Amp 14.6 Volt LiFePO4 Battery Charger,12.8 Volt LiPO Lithium Battery Charger,Smart Charger Maintainer for Cars,Motocycles,Golf Carts,UAV,Fishing Boat and Deep Cycle Batteries.

I have another charger (NOCO) that works for a variety of automotive batteries including lithium batteries. The lithium iron phosphate battery that I bought is spec'd for 3.5 amp charging current. The other charger I had is current-limited to 2 amps, and it was just taking too long to charge the battery (BOTKU 30 amp-hr battery, also a great battery BTW). So, hoping to shorten the time need to charge the battery, I bought this UltraPower charger. It works exactly as expected, charging at the proper voltage, and even though it still took several hours to charge the battery, the time was reduced by roughly half compared to the other 2 amp charger. I didn't try to measure the charging current, which would have been interesting, but the battery never got warm in the least and I suspect that charging current was never above the spec'd 3.5 amp (spec'd for the battery). If it was ever greater than this, it is very unlikely to have done the battery any harm given that it never got the least bit warm and given that the battery voltage when I put it on the charger is just slightly below 12 V, 11.8 V to be precise. (Evidently, one of the main drawbacks of lithium iron phosphate is that they have to be charged slowly. Rapid charging that would cause the battery to get hot is not allowed.)Bottom line, if you are looking for a charger for this type of battery, and the spec'd charging current is in the range roughly 2 amp to 4 amp, my recommendation is that I have not found any reason to be hesitant to buy and use this charger. From my experience it is perfect for this class of battery so long as the spec'd charging current for the battery is in this range. (The charging current depends on the number of cells connected in parallel and is thus directly tied to the amp-hr rating of the battery.)

So far charged my LiFePO 12.8v 100ah battery twice with no real issue. I have notice it is slightly picky how its connected. I had open the clips and screwed them down with the battery bolts but it never charged. Swapped to just clipping them to the post (looks like it wouldn't give a good charge) and it works great. Not the fastest charger but is the cheapest thats worth the money.

Great charger. Works exactly how it describes.

I have a bike in a storage unit where there is no access to an AC outlet. I depleted the battery to 50% while fiddling with accessories. I recharged to 100% using this device plugged into a portable power bank with 42000 mAh capacity.It took about an hour, and the power bank had 15% left.The unit did get hot to the touch, but the temperature was steady, and the output was at 13.8V.It serves a purpose for my needs if the bike is not ridden for a while, with portability being the high point.As noted in other reviews, heat is not managed properly by design, and I don't expect this to get heavy use, but it worked fine for my needs, which hopefully will work again if needed.

Use it to charge the batteries for my kids' electric cars. I bought standard LiFePo4 batteries with connector adapters, and this charger with the crocodile clips easily charge them. Quite fast too, at nearly 50W.

My Lifepo battery was reading .75 volts (that is not a typo, less than 1 volt). I tried my Noco GB70 a couple times and nothing happened. I hooked up the UltraPower and the 4 green lights started to light up in sequence per instructions. After about 3 hours, it was still trying to resurrect the battery, but I went to bed. This morning I discovered it is completely charged and showing full power! I had given up on the battery, but thought I’d try the inexpensive UltraPower as a last resort and am glad I did. I agree that the gator clips are too small, but I did not experience any excessive heat on the unit. In fact, it seemed cool to the touch. Maybe it gets warm while working and then cools off. I Highly recommend this device! P.S. the Noco is fantastic for starting a dead car battery, not so much for my smaller LifePo trolling motor battery.

Very good LiFePO4-only battery chargerThis LiFePO4-only battery charger is perfect for my needs. I discharged a LiFePO4 battery down to 10 volts and hooked up this charger. I occasionally checked the voltage changes and went to bed so I missed a lot of timed voltage checks. When I woke up the 12 AH battery was fully charged and the LiFePO4 charger showed a full charge according to the green LED indicator display lights. The charger was room temperature. Some other reviewers mentioned that the charger gets hot during charging. That is probably when charging larger AH batteries. Those reviewers suggested gluing on aluminum heats sinks to successfully solve the heating problem. Some other reviewers complained that the “left side” LED lights never turned on at all. Hmmm, well, those “lights” are just a picture of lights on a label explaining what the actual right side LED display lights indicate about the level of the battery charge and the charging progress and as a warning if you reverse polarity. I really like the inclusion of three inline adapters. Of course, the clip leads are universal and I was really happy that the smaller adapter plug fit my charging socket on the project I built to scare away the deer that eat my wife’s garden plants.I learned electronics in the 1960s using vacuum tubes. I am flabbergasted at the sophistication of today’s super intelligent integrated circuits. This charger has a brain that has been taught to measure the voltage of the battery and apply a complicated constant voltage and or constant current charging scheme and then automatically completely shut off to match the strict critical charging needs of a LiFePO4 battery. I sometimes think that space aliens are selling us humans such technology.