So Apparently KS are developing a Wireless Electric powered Dropper Post. http://www.pinkbike.com/news/ks-electronic-wirel...

Seems this is the way that things are heading, with more and more electrical gear being integrated into bikes. EI rear shock, Di2 shifters now being added, plus the dropper post. One day someone is going to get an electric shock from shorting out while doing a river crossing. Upside is though, you may be able to use it to restart someone's heart during a heart attack!!