I don't know if that's true but save for electric vehicles, has there been any major interest in improving batteries much beyond what they do? Batteries have b

I don't know if that's true but save for electric vehicles, has there been any major interest in improving batteries much beyond what they do? Batteries have been mass marketed for laptops and cellphones in the past couple of decades and have improved steadily for the increasing needs in those markets. It's okay for cell phones to last for a day and to charge in an hour. But with electric cars, which are only really starting to pick up in the last 2-3 years or so, demand for longer range and faster charging is quite different.