Not sure how video doorbells get their power? This article breaks down every way doorbells get the juice they need to work—from old-school wiring in your walls to handy batteries you charge or swap out. You'll learn the differences, the ups and downs of each power source, and whether you need an electrician or just a screwdriver. We'll also tackle what to do if your home doesn't already have a doorbell setup. You'll finish knowing exactly what to look for before picking and powering up your next video doorbell.