This one might have to be filed under the fail column – at least for now. While throwing around some ideas for the next incarnation of DJ Big Gulp, I decided I needed to figure out how to make my own lithium ion battery packs. I bought a couple of INR18650s, some battery protection boards, and some nickel strips to connect them together. All I needed was the welder… The showstopper I thought it might be safer to try this rig out on some alkaline batteries before diving straight into the lithium ion. At first the welds seemed to be Continue Reading