Battery University™ is a free educational website that offers hands-on battery information to engineers, educators, media, students and battery users alike.
http://batteryuniversity.com/

Energy Storage Publications – BEST Battery Magazine
http://www.bestmag.co.uk/

Batteries International Magazine
http://www.batteriesinternational.com/

BCI – Battery Council International
http://www.batterycouncil.org/

ALABC – Advanced Lead Acid Battery Consortium
http://www.alabc.org/