15 watt power supply?

Thread Starter


Joined Jan 5, 2011
Hello, so let's say I need a 15 watt power supply but that's all the information I have. The question is do I need a 3V/5A or a 5V/3A power supply and why is that information not included?

I won't post what device I need to power because what I want to know is why is it advertised as a 15w device, that's all. Thanks


Joined May 3, 2013
You have a lot more options in your case. An infinite combination of (Voltage x Current) = 15. Take your pick.

How did you get 2 choices 3V/5A and 5V/3A? Or is it a blind choice?

If no further information is available, sorry, the help stops here. You need to let us know the Voltage of the device to be powered.


Joined Nov 6, 2012
It sounds to me like you might be placing too much value on "advertising-hype".
Almost all of the pre-built Chinese stuff is extremely over-rated.
Very similar to Car-Audio Amps .......
"1500-WATTS" ....... but it has a 5-Amp Fuse and 22-ga. wiring !!!

If they don't provide hard maximum numbers, just move on.