2 new patents by Tesla for a hybrid battery EV, hybrid meaning a metal-air and a non-metal-air battery acting in a range extending mode similar to a series hybrid.
PhysOrg article: http://phys.org/news/2013-09-tesla-p...ttery-evs.html
PhysOrg article: http://phys.org/news/2013-09-tesla-p...ttery-evs.html