Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V

I use Daly on all my eBike builds! But, this time, they went wayyyy above and beyond my expectations! I had already built my 52v 14s 4p 20Ah, with expensive Samsung 50E 21700 cells, and I knew I would have to tear it all down to use an active balancer. Well, the wonderful folks over at Daly, through their Amazon support, made me a special balance wire adapter, so I wouldn't have to break down the whole thing and solder these on.Because their generosity, I can simply plug in for balancing and then close the small access point I made for the balance wire plug! It's awesome! I even offered to pay for the extra wires and connectors, and they wouldn't take my money.I was already a Daly diehard but, this just took their company to a whole new level for me!Thank you so much!

I read a bunch of reviews and a few of them pointed out that the negative reviews were probably because of people not knowing how to use them or the app. I decided to give them a try and ordered eleven of these, one for each of my chevy volt 48v 12s battery packs. I downloaded the app from the Google Play store and was not shocked to find that people were correct, there is little description and it is in Chinglish which is not very helpful but with a little effort on my part, I could figure out what they were attempting to say. I watched a couple of videos on youtube but those were more on the BMS and not my 12s active balancer but they did help me to feel more confident that I was setting these up correctly. From there it went smoothly. The app has you guessing but it's really quite simple. I have eleven batteries that are going to be set up in parallel for a 48v 500aH system.Step one, click on local as these active balancers use bluetooth.Step two (for me) select parallel battery configuration.Step three, click on the plus next to each of my batteries to add them to my system.Step four, go back to the previous page which now lists my batteries by their bluetooth address.Step five (repeated for each battery) click on the ID and that takes you to the setup pages where you change the parameters, when you attempt to set the first one it will ask for your password, enter 123456 and it won't ask again unless you leave this battery's set up and return to it later.Simple. Now that I have them set up, they are doing a wonderful job at keeping my batteries' cells well balanced. This is exactly what I needed and they work flawlessly. The 13 pin cable is plenty long for me to make a cable to connect to my battery's built in connector and since I had the pinout for the chevy volt battery it was a very simple process. I could not have asked for a better product at a better price. I will review again in a few months to update on how these are holding up but I do expect good things to report.

Inside the box for this is included the sampling cable and the bluetooth adapater. However, NO cable to connect to the Daly Smart BMS via UART to UART connection? Why not? Now I gotta order yet again another something.However, for what the balancer is supposed to do, its spot on. Within 24 hours, it got the 4 cells in my battery balanced within 0.003 volts. I am more than happy with that.

I purchased a Daly BMS from Amazon years ago. My system is 16S/48v LifePO4 (300ah). I have had several batteries go bad over the years because they are improperly balanced. While Daly has "Balancing" on their BMS it's not active balancing. Even with daily charging and discharging the built-in function on the BMS is insufficient to maintain battery health. This has cost me over $1000 in battery failures.After installing the Smart equalizer the system is now balancing nicely even with the larger batteries.I initially had a few issues which was largely due to the lack of documentation. Fortunately, there are some end-user videos on YouTube. My balancer appeared to be DEAD. There are other 1-star reviews claiming the same. Probably those units were just fine. The system has one LED that only comes on when actively balancing. The default for active balancing startup is at 3.0v. This means ALL of your batteries must be 3v or higher to start balancing. I had one battery that was just under 3v. This setting can be changed in the Daly app. The second issue I had was I didn't see the Bluetooth dongle in the app. I swapped the Bluetooth from my regular Daly BMS and it worked. This allowed me to update the starting voltage. It turns out you have to add the Bluetooth dongle to the app to see it. A poor UI design in my opinion. To Fix this open the "SMART BMS" app then click on "local monitoring". Next change your battery selection to a different selection than what is currently selected, even if you are on the correct setting. This will display a link "Search". Click on search and add your device(s) to the app. Now change the battery type back to the correct one if needed.Also, you can confirm the Bluetooth is broadcasting by going to your phone connections and checking under Bluetooth / available devices. You won't be able to connect to it in this method but at least you can see its broadcasting. The Bluetooth dongle has a label with the Bluetooth broadcast ID printed on it.Hopefully, this helps out anyone else experiencing the same issues. So far I am very happy to have active balancing enabled. Batteries were within .05v difference within a day. You can select balancing all the way down to .02v in the app but .05v is the default setting.