Lithium Ion Discussion Group

Created by Dennis Doerffel in 2003, a discussion group for Lithium-Ion cell users and potential users. Exchange experiences, get your questions answered and discuss issues around this technology and its implementation into electric vehicles or other applications.

Battery University

Online resource providing practical battery knowledge. Covering battery chemistries, battery choices and ways to make your battery last longer

Electric & Hybrid Vehicle Technology International

First published in 1995, and now sent twice a year to over 30,000* key specifiers and decision-makers throughout the global automotive industry, Electric & Hybrid Vehicle Technology International is firmly established as the world’s leading international showcase for technology and innovation in electric, hybrid and fuel-cell vehicle development and manufacture.


News and information on electric vehicles

Bundesverband Solare Mobilitat

German solar vehicle website, news and information.


German electric vehicle website

The Battery Vehicle Society

UK group for owners of electric vehicles and those wishing to build or convert their own electric vehicle. Increasing education and awareness of electric and hybrid vehicles.

Verein der Elekromobilfreunde in der Region Aachen

German electric vehicle group, co-founded by Dennis Doerffel

The Institute for The Power Electronics and Electrical Drives (ISEA) working for more than 40 years on the following research areas: Power Electronics, Electronic Devices, Electrical Drives and Electrochemical Energy Storage Systems.