One can get chargers that can put out over 150 watts over USB-PD, but your MacBoook will never negotiate nor accept more than 87W. So it should be no surprise that you can have it on charge and still see battery-life slipping away.Īnd there's nothing you can do about that behaviour, other than to reduce the machine's workloads. Hello, I would like to buy a power bank that is capable of charging a Macbook pro 2017 (no touch bar) Thanks for your help insider is correct in so far it is the fastest charger, but it was not your question, what is capable. The battery is organised by the little embedded switching processor into two circuits of cells, and each circuit runs the MacBook whilst the other gets a rapid top-up, and at full load - all cores screaming, data flowing, screen burning and WiFi singing, your MacBook Pro can demand - and receive - as much as 130 watts sustained from the battery pack. I have a MacBook (Retina, 12-inch, 2017), that is not charging properly, losing charge while connected to the standard Apple 30W USB-C Power Adapter. They run from the battery-pack 100% of the time, even when connected to charge. MacBooks have been able to demand more power from their battery-pack than is available through the charge supply for a long time, but that's because the Mac-top doesn't actually use charger supply to power the computer unless the battery is missing or faulted out of circuit.
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