Power outlets come in 2 sizes. Powerlet / BMW / Hella type outlets are smaller than Automotive size (also called cigarette lighter size) outlets.
The smaller Powerlet size outlets are standard on many modern motorcycle makes. They require less space and are ideal to power a wide variety of electronics or heated clothing.
Adapters are available to use standard 12v automotive chargers in a Powerlet outlet or to plug a Powerlet plug into an automotive size outlet.