There are three kinds of power sources for Eufy doorbells:
- Battery and wired: The Eufy Video Doorbell 2K (Battery-Powered) supports existing doorbell wiring (8–24VAC) and battery power so you can install it where you need it. While the battery lasts up to 180 days on a charge, we prefer using wiring to avoid recharging your doorbell regularly.
- Wired only: By skipping batteries, Eufy’s two wired models are smaller overall but require a 16–24VAC doorbell transformer to run. They’re not compatible with as many wiring setups as the 2K Battery. They piggyback on existing doorbell chimes for power but don’t control them—you need the included wireless chimes for notifications without a smartphone.
- Battery only: Eufy’s cheapest model—1080p with battery power—doesn’t even come with wiring terminals on the back. You need to remove it from the mounting bracket for charging. Its battery is smaller than the 2K version, lasting around 120 days on a charge.