Why doesn't my battery last so long?

With the Huawei Watch gt2, the manufacturer states that the battery lasts 2 weeks. However, my battery only lasts 5 days. What can be the reason?

You use it. Read carefully that no two weeks are promised, but only "up" to two weeks and that every activity reduces this value.

There are some apps in the background, they need some power from your battery 🔋. Check which apps, because the most appetizing has sake

A battery lasts around 500 charges, after which it quickly loses capacity and has to be charged earlier and earlier.