Heltec Automation 4S 5S 6S 5A Capacitor Active Equalizer Balancer Lifepo4 Lithium Lipo/Titanate LTO for Battery Car Audio Group Balancer

I bought this to balance some LiFePo battery cells I made. The cells I used were A123 B series configured as 12 Volts in an 3x 4S24P array giving about 180Ah capacity. Which is in the right range for this device.The principle of operation is what I liked. Capacitive charge carriers are simple, efficient and reliable. They do not make actual measurements of voltage. They basically charge a capacitor over one cell and then discharge it to another. Repeat over all the cells many times using a small charge (the capacitance) means it provides a regular balancing current. Because of the way it works it does not need to know anything about the battery. All its doing is moving charge till there is next to zero volts difference between the cells. Once this is achieved the current drops to zero as the capacitors and the cells will all be at the same voltage. Net result is very good balance and low power consumption when balanced (quiescent current).This particular one stops balancing below a certain cell voltage to avoid discharge related issues.The bonus with this technique is that it does cell balancing all the time unless you switch it off. So you get continuous balance as opposed to top or bottom balancing.I've not had it on for long so long term reliability I can't comment on, but there is not much to go wrong so long as the capacitors are higher quality. This is pretty easy to do now given the proliferation of switching supplies in the market so is cheap and well understood. I doubt I will have issues long term.Gave it five stars as it does exactly what it says it does, does it well and uses a good technique to do so.

I have this in a 6s 43.5ah scib bank. It works great to keep the cells balanced

Cables were long enough to fit around my massive battery, I made sure to make them all equal length and crimped on 22 guage ring terminals with heat shrink wrap to make it water tight. Then used a wire brush + dielectric grease and this thing keeps my cores perfectly balanced on top of a very cheap BMS.

Price sucks especially since my battery is 4S. I'm paying for a capacity I don't need.But they work. I'm using two of these in parallel to balance two 280ah 12 volt batteries. My cell Delta's at 14.2 / 3.55 volts per cell are under 10 millivolts. Can't complain about that. I'm using my Victron 712 BMV relay to turn these on at 13.5 volts. I'm glad that these allow you to turn them on and off via switch or relay. I'm also happy they have a small LED to let you know they're on.

great item. works just as described. no complaints.