Switch does not solve the problem, "backup battery"? You're just delaying the inevitable, why not just demand that they make the batteries bigger in the first place?
What good does a "mini engine" do? You can't turn it on automatically, that's an enormous safety risk and would never make it past insurers or the government, and it can only last as long as its fuel holds out, again you're just delaying the inevitable. Solar panels don't help if you're parked in a garage, which is where most people park their fancy roadsters, and they'd have to be huge to maintain the charge anyway.
And absolutely none of this contradicts my original point: It's a technological limitation. This is how batteries work. You're not proposing a solution, you're proposing unworkable band-aids.
What good does a "mini engine" do? You can't turn it on automatically, that's an enormous safety risk and would never make it past insurers or the government, and it can only last as long as its fuel holds out, again you're just delaying the inevitable. Solar panels don't help if you're parked in a garage, which is where most people park their fancy roadsters, and they'd have to be huge to maintain the charge anyway.
And absolutely none of this contradicts my original point: It's a technological limitation. This is how batteries work. You're not proposing a solution, you're proposing unworkable band-aids.