How do lithium-ion batteries power our portable devices?

Lithium-ion batteries are like little energy storage boxes that help your phone or tablet keep working when you're not charging it.

Imagine you have a backpack full of marbles, these marbles represent energy. When your device is on, the marbles roll out of the backpack and power the screen, games, and music. But when you plug in your device to charge it, like plugging in a phone charger, it's like putting more marbles back into the backpack so you can keep playing.

Inside a lithium-ion battery, there are tiny particles called ions that move around like marbles. When your device is running, these ions travel from one side of the battery to the other, this movement gives power to your device. When you charge it, the ions go back to where they started, ready for more action.

It's like having a toy car with a battery inside, when you press the button, energy moves through the car and makes it zoom! The lithium-ion battery is just doing something similar, but for your phone or tablet.