Others have probably pointed this out, but for he record - Project Better Place, or any other large-scale approach to getting many electric cars on the road, can't work with $1million changing stations as a key part of the infrastructure. The battery technology needs to be swappable by hand, ideally one technician (really ideally just the individual car owner) but two because of the weight seems reasonable. Other solutions to the power-recharge-distance conundrum just won't work. Ideas take off when they are easily adoptable. Every description of these changing stations makes them sound like they are attempting to remove 5% of complexity from a very complex process.