Anyone know what happens if your laptop is dead when you go through border control? I mean, they probably don't keep laptop chargers for every model around. I'

Anyone know what happens if your laptop is dead when you go through border control? I mean, they probably don't keep laptop chargers for every model around. I've gone through airport security with a dead laptop before at a time when they would occasionally ask people to turn on their laptop. They just waved me through.