This was a pretty cool find to bring in the new year. And, to be honest, I had no idea these power tool battery adapters even existed. For somewhere around $20-25 each on average–he said they were about $12-18 in the video, although some of the adapters prices vary quite a bit–you can get adapters for the most common power tools on the market and be able to use other manufacturer’s batteries in what you already own.
For preparedness purposes that could prove rather useful, but even for normal times it sounds like a good deal to me. So, if you’ve got your eye on a new expensive power tool by a manufacturer you don’t already own, consider a battery adapter to save yourself a lot of money.
Note: rather than linking to each individual adapter, it’s best to just look at the YouTube video description for all of the appropriate adapter links.