Wow, I'm sure we all saw this news yesterday. Quite a significant move. I've had a big interest in ultracpacitors since working to recruit for Skelton Technologies, a great Estonian manufacturer. 

Tesla are to buy Maxwell Technologies for $218m. The combination of their Ultracapacitors, and dry electrode coating technology could lead to higher energy density and lower manufacturing costs. Both key advantages for any EV OEM, where Tesla already holds an advantage. I'm no Tesla Fan Boy, but they keep confounding critics and out-performing their rivals, on and off the road. Sometimes they even make a profit!!  It's fun to watch, and with out doubt, they have, and continue to push the game forward.