3D-printed modular power bank is infinitely repairable and customizable
At first glance, the Zero is about as clunky and unattractive a power bank as you’ll ever find these days. There’s a good reason for that, though: you can take it apart without tools, swap out weak cells for fresh ones when the time comes, and keep using it for way longer than any other power bank will last.
It looks like all of the cells are in parallel. I sure hope they have a fuse for each cell. If not, it will get very exciting when someone puts one in backwards.