I didn't think Echo had a battery? I tried unplugging it and restarting, but still saying "low battery"? Anyone else having this problem?
Do you have some other connected device? A bluetooth speaker, maybe? It's probably telling you that device has a low battery.
Or if using an Echo Alexa remote, it's probably talking about that.
I'm being extremely clever up here and there's no one standing around looking impressed. What's the point in having you all? - Dr Who