I was searching around for batteries to use in my personal electric scooter project. I've found some LiFePO4 that has sufficient capacities like:
But they seemed heavy and I found out that there is an alternative some people have constructed arrays from 18650 Li-ion batteries that worked for them. I am a bit of a novice when working with batteries. I don't know how hard or hazardous it is to construct the array myself and maybe it's just safer to buy them pre-constructed. So I've searched more and found these:
These modules seem like a good solution for me, but I have never use them or something similar and can't find anything like reviews or forum posts about these are they worth the money? Have anyone tried something similar? What should I know about them ? Or should I just try making a custom pack myself?