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Tips & Techniques:Power adapter matching

wall wart
If you don't have the wall wart that "came with" your unit and you want to know if a substitute adapter will work:

Match voltage requirement. Exceed current requirement.

thanks to Zemlin

Contributors: mw, joeq
Created by joeq, 11th January 2008 at 02:37 AM
Last edited by mw, 27th March 2012 at 03:05 PM
Last comment by rrichard63 on 9th March 2008 at 01:30 AM
2 Comments, 9,971 Views

(2) Comments for: Power adapter (wall wart) matching Page Tools Search this Page
Old 13th January 2008
Gear Addict
muziqfreek's Avatar
But Rule number one should be.... (With regard to Hard Drives)

Always label which adaptor goes with which hard drive!!!

I've not (touch wood) yet oversupplied an HD with too much juice... simply by putting a strip of white insulation tape and then giving it a letter; on the HD, the power lead end and one more on the block end.. Always avoids any confusion!!!
Old 9th March 2008
Gear Addict
rrichard63's Avatar

Match polarity, too

In addition to the same voltage and enough amperes of current, you also have to match polarity. If the piece of gear or its manual says "center negative", then the wall wart needs to say the same. Ditto for "center positive".

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