I've yet to find a laptop mainboard that doesn't work without a battery. As I've written below, I'm getting extremely boring old office laptops with integrated graphics. Usually phones also work fine without a battery. However, I'm not touching phones because I will not fiddle with locked bootloaders and "the Android situation". Running plain Linux is a hard requirement for me.
I've yet to find a laptop mainboard that doesn't work without a battery. As I've written below, I'm getting extremely boring old office laptops with integrated graphics. Usually phones also work fine without a battery. However, I'm not touching phones because I will not fiddle with locked bootloaders and "the Android situation". Running plain Linux is a hard requirement for me.