Can Alexa work without power?

Yes. This is true for the vast majority of Amazon's Echo devices, including: Echo Show, Echo Plug, Echo Studio, and Echo Flex. Echo Dot needs to be plugged into the wall at all times. Without power, you won't be able to summon Alexa through voice commands.

Will Alexa work if my phone is not in the house?

Call your Echo device No one at home is answering their phones? You can call your Echo speaker using the Alex app on your phone. To get started, open the Alexa app and select Communicate and then tap Call. You can either choose to call a specific device or call all of your Echo devices. Nov 12, 2020