system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why cant phones turn on instantly when plugged in after dead battery but laptops can?
gpt
Different circuitry design priorities. The outside power to a laptop is designed to run the computer first. Then any excess is used to charge the battery. So the circuit delivers the full voltage to the motherboard from the go. The phone's charging port has a primary function of topping up the battery. The phone's circuitry has to wait for the battery voltage to build up to the point where the circuitry can operate. It could work differently if the design aim was to be able make phone calls sooner with a dead battery.