Porsche has announced it will produce hybrid and plug-in hybrid versions of its Boxster and Cayman sports cars. The announcement comes as Porsche moves forward with development of its full electric sports cars, set to launch in 2022. The hybrid versions will launch in the coming years, and will feature a 48-volt battery. Interestingly, the non-plug-in hybrid version will not be able to run only on the battery. Clean Technica has the story. Read more.