Fafeicy 24V 20A 7S L-ithium Li-ion 18650 Battery BMS Protection Board, with Balancing, Stable Protective Functions for Charging and Discharging

I had some batteries I had planned to use with this BMS, but they failed testing so I am still gathering a few more to finish building a power pack.There are no instructions with this BMS, but there are plenty online and examples if you are not familiar with how to wire a BMS. Looking at this BMS I do not see a reason this would not work.The reason for the low star for now is after purchasing I noticed the note in the Specifications that state the old version and new version would be sent randomly. I have no idea what the difference is in the versions but they should be separate items, or at least older version should be cheaper. My guess is the intent is to buy from different suppliers so you may not get the exact same board everytime.Once I get a good set of batteries I can update the review with accurate tests and examples.