It is not pretty, but it works. All the good things in life come inside a Lego box. It does look like a homemade bomb. When the Panasonic GA cells came out I got really excited, so excited in fact that I purchased 100 of them to build into a 7P14S pack in my spare time. Months went by and the batteries just stared at me from under the desk wishing that I would put them to good use. I ended up buying a spot welder off eBay, which ended up self-destructing before the pack was even finished. After a lot of procrastinating, I splurged for an even MORE expensive spot welder, which is the one that I should have bought from the get-go (review here). The entire process of building a very large pack like this from scratch was incredibly educational, frustrating and cathartic at the same time. I have a pretty strict rule that I won’t buy or use ANY product that I don’t completely understand how it works and that I can’t tear down and put back together. Building my own 18650 ebike pack seemed like a logical progression in support of that belief system. For people who are looking to build your own ebike pack there are some great resources on Youtube under Damian Rene’s channel and Bruno ‘Mo...