I also bought it and am very happy with it. The remote control runs on a rechargeable battery, it is not possible to change to conventional batteries. LG

The battery is permanently installed and can be charged via a charging adapter.
Very fast charging time and lasts approx. 2-3 hours.

Permanently installed but quickly charged👌

No, the battery is permanently installed.

The part can be recharged and has a very long runtime

Hello the battery is integrated and recharges like an iPhone

Has internal battery not removable with dedicated charger

As far as I can see, the battery is not replaceable. But the battery lasts for 2-3 hours without any problems.