Laptop battery life short?

My notebook told me 5 minutes ago that the battery would last 1h 21 minutes and now it tells me it's only 57. And now all of a sudden 59 minutes again. The notebook is 5 days old

It's because you're using it

But in 1 minute "20 min." Losing the battery is normal, isn't it?

The battery life varies because the load is different.

When your laptop is used heavily, it uses more energy. If, on the other hand, it is only on the desktop, for example, it saves energy.

The remaining term is based on average values. That is why it can change.