They last very long, the only thing you lose with time is capacity. When the battery reaches a capacity that is no longer useful for use in a car, the battery i

They last very long, the only thing you lose with time is capacity. When the battery reaches a capacity that is no longer useful for use in a car, the battery is sold to utilities. One use case would be to buffer the energy from renewable sources like solar or wind and release it when theres higher demand. Its a low-scale solution to the biggest problem of the energy spot market: charge is highly perishable. Use it or lose it.