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Canada declares Flipper Zero public enemy No. 1 in car-theft crackdown
(arstechnica.com)
This is a most excellent place for technology news and articles.
There are various sleep modes and it looks like Bluetooth can be active during some of them.
https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/bluetooth-power-management-for-modern-standby-platforms