EESAT 2005 http://www.sandia.gov/eesat/
Electrical Energy Storage - Applications and Technology. On batteries, super capacitors, SMES, flywheels, CAES, and pumped hydro. Three days in San Francisco, CA, US
EVS21 Monaco http://www.evs21.org/
"Act now for sustainable mobility" Worldwide International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium & Exhibition. 5 days in Monte Carlo, Monaco.