It's essentially impossible to charge a battery in the same time as filling a gas tank. The currents involved would be immense, and besides requiring heavy-duty conductors and power electronics, such high currents would incinerate any lithium-ion battery on the market today in spectacular fashion.

Battery swapping is probably the most practical solution, but developing a standard battery pack that can be used in a variety of models and easily swapped - not to mention the logistics and tracking to distribute them nation-wide - would probably take longer than developing higher-capacity batteries.