Brookhaven National Laboratory recently characterized activated graphene fabricated at the University of Texas-Austin, concluding that it had an power density that could rival batteries, at a quick-recharge rate that exceeded batteries, and a lifetime of at least 10,000 charge/discharge cycles.

May 18, 2011- Source: http://nextgenlog.blogspot.com/2011/05/graphene-activated-graphene-boosts.html