Common external power supply

Okay, kiddo, have you ever seen a toy that needs batteries to work? Well, sometimes there are bigger things like computers and routers that also need power to work. Instead of using batteries, they have something called an external power supply. This is like a special cord that plugs into the wall and then into the computer or router.

The external power supply has a special job to do! It takes the power from the wall and makes it just right for the computer or router. It's like getting a drink of water from a big bottle, but pouring it into a cup first so it's easier to drink.

Having a common external power supply means that lots of different computers and routers can use the same kind of power supply. It's kind of like how lots of different toys can use the same kind of batteries.

This is really helpful because it means that if you lose or break your power supply, you can easily get a new one that will work for your device. It also makes things easier for companies who make computers and routers because they can use the same power supply for lots of different products.