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Oddly I have to charge these things a lot and I'm trying to determine which power of AC-USB charger to buy without being wasteful.

For example, if I use a 12W (2.4 amp) iPad charger, will the magic mouse consume all 12W, or will it use a stepped-down trickle like 2.5 watts from the 12 watt charger?

Apple doesn't seem to list this info anywhere.

  • Define "wasteful"? – IconDaemon Sep 4 at 11:56
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    This does not directly your answer your question, but may be a solution to your actual problem. Apparently the MM2 charges faster when switched on. Did you try that? – n1000 Sep 4 at 12:59
  • @IconDaemon Say I have to charge 10 magic mice at any given time. I could spend $15-per-port for a huge 12W adapter (total $150), or spend $4-per-port for a 6W adapter 60Wx10Port charger (total $40). Now multiply this by floors in a building and buildings on a campus. – y3sh Sep 4 at 15:14
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    You should edit your question to indicate that you're dealing with many MM, not just one or two, which was my assumption. – IconDaemon Sep 4 at 15:51
  • Looking at the fact that you want to charge many mice, I would get a USB voltmeter, test the wattage, and purchase accordingly. There seem to be no specs out there. Make sure to answer your question :-) – n1000 Sep 5 at 10:54
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Using a USB voltmeter (at @n1000's recommendation), this is the Magic Mouse 2 consumption rounded to the nearest 10th:

0.5 Amps (2.5 Watts) while switched off

Apple mouse charging while off

1.5 Amps (7.5 Watts) while switch on

Apple mouse charging while on

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