There has been a boom in ebike builders making their own battery packs out of the popular 18650-format cells (18mm diameter, 65mm long), and I want to share what I’ve found out about the guts of an 18650, so you will understand more about proper DIY pack-building methods.
*Why would somebody make their own pack?*
The existing battery pack vendors will only make (and stock) the packs that they think they will sell enough of, to make it worth risking their available cash…
Read more at: