Nickel-iron battery

Okay kiddo, so have you ever seen a battery before? It's a type of thing that gives things like toys and flashlights energy to work.

Well, a nickel-iron battery is a special type of battery that is made up of two metals: nickel and iron. These metals are put together in a special way to create a little pocket of energy that can be used to power things.

One of the really cool things about nickel-iron batteries is that they can last a really long time without needing to be replaced. They can also survive in extreme temperatures, which means they are great for things like remote locations where it's very cold or very hot.

So, in summary, a nickel-iron battery is a battery made up of two metals that can give energy to things and can last a really long time without needing to be replaced, even in extreme temperatures.