They do have electric bikes with standard batteries. They do have battery swap locations. If they aren’t the same brand then they must have a standard type they use. Like a propane gas tank swap place. I’m sure it would be hard right now to standardize car batteries because the technology is changing relatively quickly. The biggest issue is not having “right to fix” laws in the US. Companies are allowed to continue to make money off of cars, tractors and other products after you buy and own them. They keep a monopoly and if anything this slow technology advancements with proprietary rights. When car companies first started making cars there biggest advantage was aftermarket opportunities. Now if you buy a Tesla or such you can’t modify or repair without permission from them. Monopoly’s delay progress. We might be flying electric cars but now without oil monopoly’s!!