With 18650 cells as cheap and plentiful as they are, you’d think building your own custom battery packs would be simple. Unfortunately, soldering the cells is tricky, and not everyone is willing to ...

I recently stumbled on a growing group of electronics hobbyists who are scavenging 18650 lithium ion batteries from laptop batteries to build sizable Tesla-style powerwalls. They're often paired with ...

We don’t know much more than what we see with [Kounotori_DIY]’s battery loader design (video embedded below) but it just looks so cool we had to share. Watch it in action, it’ll explain itself. Before ...

If you've owned a laptop for a few years, you've no doubt encountered the problem that the battery eventually loses its ability to hold a charge. Generally what happens is that one or more of the ...