0
votes
1answer
88 views

How can a power supply rated 7A be strong enough for two devices rated 5A? [closed]

I am not understanding something fundamental to amperage: Consider this adapter which outputs 12V 7A. It claims that several (eight, in this case) devices running at 12V 5A can draw enough power from ...
0
votes
0answers
116 views

How to test laptop adapter voltage with a Digital Voltage Detection Screwdriver Test Pen

Couple of days ago I replaced my laptop adapter, and when I use that, some amount of current discharges through the sockets,ports...etc (i.e. audio out). So I checked the adapter with a Test Pen (I ...
3
votes
1answer
2k views

Is it safe to use a laptop AC adapter with 220V power if the AC cable is not rated for 220V?

The AC adapter supplied with my laptop is designed to accept voltage in the range of 100-240VAC at 50-60Hz, but the AC cable that plugs into the adapter unit itself is only rated to 125VAC 7.5A 2.5A. ...
8
votes
1answer
3k views

Charge Apple computers bought in USA to use in Europe

I bought an Apple MacBook in the US and would like to use it in Italy. On the cable, it says: 2.5A 125V. What are the possible solutions to charge my computer? Use an adapter, a plug converter or an ...