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Hi Shawn
I have several pieces of equipment (mounts, cameras, accessories, etc) that are variously centre +ve or centre –ve that have a 2.1mm plug/socket. Using a Brother Labeler machine (Office Works), I printed two sticky label strips for each device. I stuck one label on the body of the mains adapter and one label on the cable near the plug, describing the polarity and the piece of equipment it was purchased with.
So, far, this has worked. The labels are the 9mm wide white strips with black ink so they are easy to read under a dim red light.
Cheers
Dennis
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