Nickel–iron battery

Okay, kiddo, let's talk about a special type of battery called a nickel-iron battery. This battery is made up of two main parts - a nickel electrode and an iron electrode.

Now, when you put the battery in something like a toy car, the chemicals inside start to react. This creates energy that can be used to make the car move or light up a flashlight.

One cool thing about these batteries is that they are very durable and can be used over and over again. This is because the nickel and iron parts are strong and don't wear out easily. Plus, they can handle really extreme temperatures without breaking down or exploding.

Now, there are other types of batteries out there that are a little bit more popular, like the ones you use in your TV remote or your mom's phone. But the nickel-iron battery is still pretty cool because it's a very old-fashioned design that has been around since the early 1900s.

So that's it, kiddo - a nickel-iron battery is just a strong battery that can be used over and over again and can handle really tough conditions without breaking down.