I bought the tiny gadget on a bit of a whim. Over a year later, it's become one of my favorite gadgets and an EDC staple.

Every home battery comes with a warranty, but not all of them are as great as they sound. There are three main components of ...

If you look at the periodic table, the most electronegative element is lithium, while the most electropositive is fluorine. So you might think the ultimate battery would be lithium-fluorine. But in ...