This ultra-fast $40 AA/AAA battery charger is my favorite gift to give techies

Over the past decade, I’ve grown used to charging every electronic gadget with USB power. Whether it’s the Micro USB of my keyboard, the USB-A of my charger block, or the USB-C of my vaporizer, it’s USB all the time. So color me surprised when I became a dad and discovered that just about everything kid-related still uses AA and AAA batteries.

And it made me realize how many modern devices still rely on old-fashioned rechargeable batteries. Remote controls, flashlights, digital scales...