Every so often the batteries need to be reset;
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Turn off your devices at least once a week
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you can do a restart, but we recommend a complete shutdown
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If it charges slowly or doesn't charge at all
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plug in the power cable
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press left shift + control + option + power button
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wait 10 secs before releasing
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wait another 5 seconds and turn on
If you continue to have problems, please bring your Mac into the IT Office with your charger.