Making sure a shared car is charged sounds like a nightmare. The whole point of car sharing is the cars get more use and spend less time parked. Considering how long it takes to charge some of these rigs, I'm surprised that the sharing companies have adopted them. My car share offers three models of battery-electric vehicle, one of them is the ridiculous Scion that only goes 35 miles between charges. Personally I don't understand how the economics works on that.