Having scouerd the internet, I gather keeping a lithium battery at 100% charge for prolonged periods is a bad idea. While there seems to be a workaround for magsafe macs (How do I keep a MacBook battery charged to only 70%?), there doesn't seem to be a straightforward approach for the usb c version. When plugged into a 15 watt usb c phone charger, the mac indicates power source - AC, battery not charging. Is powering this way a good idea? Could it limit battery cycles and potentially prolong it's life?
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Your mac should correctly manage the power coming in. Using a low amperage charger vs a high amperage one should not affect your macs power switching logic.
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