Cars have way more capacity than they typically need, and very predictable usage patterns. If your car has 400 km of range and your daily commute is 80 km total

Cars have way more capacity than they typically need, and very predictable usage patterns. If your car has 400 km of range and your daily commute is 80 km total, you can pretty safely charge to only 200 km and not get range anxiety. In the rare cases where you need as much capacity as possible (road trips), you know your approximate departure time, so the battery only needs to be at maximal charge for a short time. Laptops don't get used like that. People plug them in, then unplug and walk around with them until they either they run out of power or their meetings are over. It's really asking too much to have people plan their usage out. Plus the draw rates aren't predictable. If I can get away with just checking email, my laptop lasts all day. If I have to do a big C++ compile that's 30 watt-hours right there. I might also add that really only Tesla is doing the charging guidance UI. Other car manufacturers spend a lot of resources to perpetuate the illusion of a battery working like a fuel tank.