A wireless earbud (10/10a) having an idle mode and an operational mode, the wireless earbud comprising: an earbud housing (12, 16); a loudspeaker element; a rechargeable battery; and at least one main printed circuit board having disposed thereon circuitry for wireless radio communication, audio codec and earbud operation control, wherein the circuitry is configured for automatic power preservation by: detecting connection of said battery to a charger and in response entering the idle mode, wherein existing connections to a second wireless earbud and to a wireless audio streaming host device will be disconnected; and detecting disconnection of said battery from said charger and in response entering the operational mode by: attempting a true wireless stereo, TWS, reconnection with the second wireless earbud; if the attempt is successful, operating the wireless earbud as a TWS audio receiver and otherwise operating the wireless earbud as a mono wireless audio receiver; if operated as a TWS audio receiver, determining (146, 148) whether the wireless earbud is a master device or a slave device with respect to the second wireless earbud; if the wireless earbud is determined to be a master device, attempting (150, 154) to reconnect with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable; and if reconnection with the wireless audio streaming host device fails, initiating (158, 160) a pairing procedure with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable. an earbud housing (12, 16); a loudspeaker element; a rechargeable battery; and at least one main printed circuit board having disposed thereon circuitry for wireless radio communication, audio codec and earbud operation control, wherein the circuitry is configured for automatic power preservation by: detecting connection of said battery to a charger and in response entering the idle mode, wherein existing connections to a second wireless earbud and to a wireless audio streaming host device will be disconnected; and detecting disconnection of said battery from said charger and in response entering the operational mode by: attempting a true wireless stereo, TWS, reconnection with the second wireless earbud; if the attempt is successful, operating the wireless earbud as a TWS audio receiver and otherwise operating the wireless earbud as a mono wireless audio receiver; if operated as a TWS audio receiver, determining (146, 148) whether the wireless earbud is a master device or a slave device with respect to the second wireless earbud; if the wireless earbud is determined to be a master device, attempting (150, 154) to reconnect with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable; and if reconnection with the wireless audio streaming host device fails, initiating (158, 160) a pairing procedure with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable. detecting connection of said battery to a charger and in response entering the idle mode, wherein existing connections to a second wireless earbud and to a wireless audio streaming host device will be disconnected; and detecting disconnection of said battery from said charger and in response entering the operational mode by: attempting a true wireless stereo, TWS, reconnection with the second wireless earbud; if the attempt is successful, operating the wireless earbud as a TWS audio receiver and otherwise operating the wireless earbud as a mono wireless audio receiver; if operated as a TWS audio receiver, determining (146, 148) whether the wireless earbud is a master device or a slave device with respect to the second wireless earbud; if the wireless earbud is determined to be a master device, attempting (150, 154) to reconnect with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable; and if reconnection with the wireless audio streaming host device fails, initiating (158, 160) a pairing procedure with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable. attempting a true wireless stereo, TWS, reconnection with the second wireless earbud; if the attempt is successful, operating the wireless earbud as a TWS audio receiver and otherwise operating the wireless earbud as a mono wireless audio receiver; if operated as a TWS audio receiver, determining (146, 148) whether the wireless earbud is a master device or a slave device with respect to the second wireless earbud; if the wireless earbud is determined to be a master device, attempting (150, 154) to reconnect with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable; and if reconnection with the wireless audio streaming host device fails, initiating (158, 160) a pairing procedure with the wireless audio streaming host device and other known wireless audio streaming host devices if applicable.