Soon there will be a company offering lightweight micro-turbine range extenders.
https://cleantechnica.com/2015/05/10/wrightspeed-unveils-turbine-range-extender-for-medium-heavy-duty-electric-powertrains/Energy density of hydrocarbons is always going to TRUMP batteries and the carbon output is negligible, but somehow I foresee libtards screeching about this.