24V Battery Equalizer 2 x 12V Batteries Voltage Balancer Charger for Gel Flood AGM Lead Acid Lithium Battery (HA01 Balancer)

Title says it - I’ve had this equalizer about a week now and the batteries stay within 0.01V of each other. Before I installed it the 2 150aH LiFePo4 batteries were several tens of volts apart.The 2 simple LED’s on the front of the unit make it easy and clear to see the batteries are balanced, and if not, which one is being “charged” and “discharged”Note “charged” and “discharged” isn’t exactly accurate, the equalizer doesn’t present a significant load on the batteries, it simply transfers a very small amount of current from one battery to the other if needed.This unit replaced my previous Eco-Worthy unit.

I have several of these at our cabin with 8 batteries. Have used this for several years and they really do improve the life of your batteries. They work great keeping the batteries level with each other so that one doesn't over charge and another deplete.If you have a system with several batteries I would highly recommend using this with your system. We have 8 AGM batteries and 4 of these units and it keeps the charge of the batteries the same across all of them.

I purchased two to balance my four batteries. They were working fine for a while. One of them caught a fire today after I reorganized my shelf. Fortunately, I was home to eliminate the threat.

I wanted to use this to balance 12.8V LiFePO4 packs before bonding. They are supposed to charge at 3A, so I was a bit worried this 5A balancer would be too much. In practice I didn't need to worry. I have only seen a little over an amp, and that was only when the battery voltage differed by more than 1 volt. The normal voltage range for these batteries is quite small so I could only see this when I attached one of the batteries to the charger.Edit: I ended up with a different use case for this device. It is now a battery tender. I can use a lifepo4 pack to keep my car on the street topped up, just changing out packs every week or two. It is slow as lifepo4 packs are only a volt above my desired car battery at peak, but it does the job and fits easily under the hood.For already close batteries the current is quite small (0.2A) so it can take a while to balance. Not sure if this is the intended behavior, but that's been my experience.The flashing indicator works as described in the manual to indicate which battery is lower, and receiving charge.Build is a plastic case clipped together. The circuit board is potted inside. Seems like hard epoxy type. There's a large 63V capacitor visible, and 4 of some squarish mosfet-like component. A few smaller capacitors are visible.The wire is marked 16 AWG, but seemed smaller like 18 AWG. Had trouble stripping it with my stripper set to 16 AWG. It was terminated with ring terminals, but I replaced them with spade terminals.

I am using it for a 1500W UPS with two 12Volt series batteries (total 24V).It seems to be balancing the batteries correctly.

Don't see any issues. For the price, totally acceptable.

I attached one of these between two 12v batteries connected in series. Each battery was charged exactly to 13.26v. This is why I was surprised to see the light under “battery A” start blinking once connected. According to the pamphlet that comes with the unit, this means battery A is at a lower voltage than battery B and the unit is transferring current between them. I was skeptical so I unhooked and switched the batteries around and hooked it up again and the battery A light again started blinking. If this thing was real then the battery B light should have started blinking. This confirmed my suspicion that this is just a box with a blinking light to make it look like it’s doing something. Straight back to Amazon it went as a defective product, surely to be sold again to some other chump.

It works well. Note that it does draw a very small amount of current from on side all the time so it causes some imbalance but if you regularly top charge like i do it's not noticable.