Build another 13S for kids, drift trike
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I have batteries which are 7, 5 years old, still doing good. Only complaints i got are from people using modules on skateboards, mounting them flat on the bottom, where there is flex and excessive vibration. Mountain boards with boxed batteries doing fine.
If you have 3D printer, i can supply CAD files for the modules, from those you could design N.E.S.E form factor BMS enclosure so its all integrated and nice. For above 13S i made 2S side by side enclosure, no web or hanging wires, no duct tape or shrinkwrap. 3D printed cage which mounts to the box.
I could offer help designing something bespoke if needed, send a file or ship a part.