The electricity drained by a device
Questions tagged [power]
736 questions
5
votes
1 answer
Is it okay to use an iPhone power adapter for other devices?
I have some other devices, Philips Sonicare Toothbrush, Xiaomi Powerbank, and Bose Headphones.
Can I use iPhone's 5W power adapter and/or USB cable to charge these devices? Is it safe for their batteries?
Dan Creţu
- 51
- 4
4
votes
2 answers
How Can I Stop My Mac From Reopening Applications After A Power Failure?
I live in the woods and lose power frequently. When this happens, MacOS tries to restore every application that was open when the power went out. I don't want it to do this. How do i prevent this from happening.
Please note, i am not asking about…
2
votes
1 answer
Do I need a voltage converter for Japan, for MacBooks or USB devices?
Japan uses 100V; I will be in parts of the country using both 50Hz and 60Hz. Will I need a voltage converter for a) a MacBook power supply, b) a standard AC-to-USB plug? I live in the U.S.
rogerl
- 181
2
votes
1 answer
Why do I feel 'electricity' when bridging my macbook and a double insulated charger?
Let me set the scene:
Macbook with metal case plugged into the wall with 3 pronged plug
iPhone is plugged into an iPad charger with 2 prongs
When I touch both my iPhone and the case of my macbook I perceive a mild 'electric shock' which continues…
mjmdavis
- 121
1
vote
1 answer
Charging MB Pro 16" with both monitor and power cord?
We have a current MBP 16" connected to a Dell monitor that is not providing enough power to adequately charge it. Is there any harm in connect both the monitor and the power cord, given they are both providing charge?
Geoff Fitch
- 11
1
vote
1 answer
macbook pro mid 2012 won't start
I bought a secondhand macbook pro mid 2012 without retina and it has faulty battery. So I have to use 3 pin adapter.
Yesterday, it was okay (able to turn on, browse internet) yesterday and when I got home, I got statics (when I touched it, I feels…
grepmaster
- 33
1
vote
1 answer
Is there a way to get live power usage
I'd like to monitor how much power is being used by my Mac. The tools I've found so far either list the maximum power (85W for my laptop charger) or the processor's usage (Intel's Power Gadget). I'd like a number that would be the same or close to…
Pete
- 111
1
vote
2 answers
Current power consumption
Is there a way to know the current (or average power consumption) on OS X (a Mac Mini without battery). Preferred would be a command line tool but anything is OK.
Matteo
- 8,855
0
votes
1 answer
Connecting power-hungry external devices to my iPad air 4th Gen 2020 via USB-C hub
I intend on connecting power hungry external devices to my iPad via a USB-C hub. I have seen many different names for powered hubs on the market and I cant get a straight answer as for the difference between them. So,
Do power delivery hubs provide…
Oliver
0
votes
2 answers
Why is my Mac "falling asleep" when it's told not to?
MY power settings are for "NEVER" when it comes to sleeping with AC power. AC power is always on. So why always when I come to the Mac after hours of being away, it awakes from sleep, loads up all the programs, signs back into skype etc. Where is…
JasonGenX
- 1,291