Nickel–metal hydride battery

A nickel-metal hydride battery is like a special box that has magic powers to store electricity. Inside the box there are some special bits called electrodes which are made of stuff like nickel and metal. When you put electricity into the battery, some of it gets stored in the electrodes until you need it later.

But let's talk about how the battery works. The electrodes are like two teams of tiny soldiers with different jobs. One team is made up of tiny soldiers called positive electrodes and the other team is called negative electrodes. They are like two sides of a magnet.

When you put electricity into the battery, it tells the positive electrodes to do some important work – to get ready to store some electricity. They do this by turning the electricity into something called chemical energy. This is like food for the soldiers. They take the chemical energy and use it to store electricity in the battery.

Meanwhile, the negative electrodes are also doing important work. They are making sure that the electricity being stored in the battery is safe and secure. They do this by using their own magic powers to keep the battery from overheating or catching on fire.

So, when you need the electricity later, like if you need to charge your phone or use a toy that needs batteries, you can take it out of the battery and use it. The battery will keep doing its magic work over and over again until the soldiers get tired and need a rest.

Overall, nickel-metal hydride batteries are pretty cool things that help us use electricity in a safe and reliable way. They may seem like magic boxes, but they are actually very smart and have a lot of important jobs to do!