Comment by znpy

> You would be amazed how many battery packs are multiple 18650s in a trenchcoat

Also laptop batteries used to be many (usually three or six) 18650s in a plastic trenchcoat.

You could literally rebuild your battery when it died, and pick the cells you liked the most. In theory you could pick higher-quality cells than those you find in the batteries sold on ebay from chinese stores. In theory.