If the HomePod wasn't designed to work with an older version, it may not have been able to negotiate an appropriate voltage/current combination. The voltage is actually negotiated between the device and the supply. USB Power delivery specifies profiles different voltages (5, 9, 15 or 20V) and different currents ranging from 0.5 - 20A. I have the original cord and it supports 208v but doesnt connect to the c14 connectors. The original USB Spec was for 5V you're not going to run 20 amps through a USB cable to charge your laptop at 100 watts. Hi I have a mac mini and only have access to a 208v that has I think the c14 connections. Well, yes, watts is simply volts * current, there are different combinations and not all power supplies are capable of all the different combinations.
Those little 5 watt night light bulbs get wicked hot, and they are in a free air environment.
It might not sound like much, but 18 watts without good heat dissipation adds up quickly and electronics do not like heat. That said, what it requires is probably not 18 watts continuous. somebody would need to actually measure the current draw in a worst case scenario (likely maximum volume - probably with a lot of bass). Perhaps they wanted 20 watts to account for cable losses at higher currents.Īs for the power requirement of the HomePod mini. My understanding of the USB spec is that +5V is available (at different current ratings depending on the USB variant). 18 amps at 1 volt or 1 amp at 18 volts both equal 18 watts.
Watts (or power) is simply volts * current. Replacement Power Adapter Extension Cord Wall Cord Cable Compatible for Apple Mac iBook MacBook Pro Air Mini MacBook Power Adapters 45W, 60W, 85W MagSafe 1 or MagSafe 2 Models22.
I wonder if the HomePod mini never really needed 20w, just the 20w power profile and the firmware update simply allows it to use the 18w profile.
We take all feedback very seriously.That's cool that Apple was able to do this with a software update.Īgreed - I was reading in another (MagSafe duo?) thread about USB power profiles the way I understand it is newer USB power supplies offer a different range of voltage and current combinations, so 18 watts with one supply is not the same as 18 watts in another. If you have any thoughts or ideas about this Guarantee or about your experience with us, we invite you to share them with us by sending us an e-mail. We are working very hard to serve you better and listen carefully to your feedback. Apple MagSafe Power Adapter 60W (for MacBook and 13-inch MacBook Pro) R 1 499. If you experience a faulty product or an item that has been incorrectly supplied, we promise to rectify the issue as quickly as possible.Įvery Macfixit Australia employee is dedicated to meeting the commitments above and to exceeding your expectations. You can contact us regarding any order/product related issue by call4343 or emailing us via our online Contact Us page
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