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Reply to After Installing MacOS Big Sur latest beta update, My mac is showing battery service required warning in battery Icon.
Resetting SMC solved my issue with not charging and not recognized charger - https://support.apple.com/en-ca/HT201295 Shut down your Mac. On your built-in keyboard, press and hold all of the following keys. Your Mac might turn on. "Control" + "Option"  on the left side of your keyboard "Shift"  on the right side of your keyboard Keep holding all three keys for 7 seconds, then press and hold the power button as well. If your Mac is on, it will turn off as you hold the keys. Keep holding all four keys for another 7 seconds, then release them. Wait a few seconds, then press the power button to turn on your Mac.
Nov ’20