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Short answer: a battery-powered video doorbell keeps working through a power outage, since it runs on its own internal charge independent of household electricity. A hardwired doorbell with no battery of its own stops functioning the instant power cuts, the same way any other hardwired camera does. The more subtle catch that applies to both types equally is that notifications and remote viewing also depend on your router and internet connection staying powered, which a battery doorbell's own charge does nothing to guarantee unless your networking equipment has its own backup power as well.
Recommended Doorbells for Outage Resilience
Best for battery power that keeps the doorbell itself running through an outage.
Best for a two-year quoted battery life that buffers longer outages.
Best for the wired alternative that stops entirely without backup power.
Do Video Doorbells Work If the Power Goes Out? Battery vs Wired
A battery doorbell's entire design point is independence from continuous household power, so a grid outage genuinely changes nothing about how it operates day to day — it continues ringing, recording and responding to motion exactly as it would on any other day, drawing down its stored charge at the normal rate. This is a structural advantage battery doorbells have over hardwired systems specifically during outages, even though hardwired systems generally offer other advantages the rest of the time, like never needing a recharge at all under normal conditions.
A hardwired doorbell with no internal battery backup stops functioning the moment power cuts, with zero coverage until power returns — identical to how any other hardwired camera or NVR behaves during an outage. Some premium wired doorbell and chime systems do include their own backup battery specifically to bridge outages, but this is a feature to check for explicitly rather than something to assume is standard across all wired doorbells.
Why the Doorbell Working Is Only Half the Answer
Even a fully charged battery doorbell cannot notify you or show a live feed if the household router and modem have also lost power, since the doorbell's alert has to travel over WiFi and then the internet to reach your phone. A power outage that also cuts the router means the doorbell may still be recording locally to its own storage, if it has any, but the live-alert and remote-viewing functions that owners rely on most day to day are effectively offline regardless of the doorbell's own battery status. This is a commonly overlooked gap — owners assume their battery doorbell is fully protected during an outage and are surprised to find notifications silent because the router itself lost power.
Closing the Network Gap During an Outage
A small UPS (uninterruptible power supply) sized for just the router and modem is a relatively inexpensive way to keep the network layer alive through a typical outage, restoring full doorbell functionality — alerts, live view — even while the rest of the house has no power. This is a more targeted and affordable solution than backing up an entire household's electrical system, and it specifically closes the gap that a battery doorbell alone cannot on its own.
See what happens if a camera loses power for the broader power-outage picture across all camera types, and how long does a video doorbell battery last for how much runtime a doorbell's battery actually provides.