What Is The Polarity Markings

In order to select the proper converter for your electrical device, you need to be sure that the polarity is correct. Polarity is generally described as either "tip positive" or "tip negative" and is often indicated using the symbology to the right. You will need to know the polarity for both the converter and for the power jack on your device.

If the converter has a fixed tip, the polarity should be indicated either on the label or in the manual or instructions. If the converter has a changeable tip, polarity should be indicated by markings on the tip and the connection point.

The electrical device will generally have the polarity marked very near to the jack itself. If there is not a polarity marking, you should check the manual or instructions for power requirements. If the information is still not found, you should contact the device's manufacturer for assistance.

Note: Devices which require a proprietary adapter or converter may not list this information at all, as using a non-approved adapter or converter could cause damage to the converter or attached device and/or constitute a fire hazard.

See the site, here.