Questions about LEGO Powered UP - Hub

No, not integrated. But what I do is I don't have batteries in it but rechargeable 6 x 1.5 V batteries. Although LEGO says that doesn't work. Works TIPTOP. I have changed the battery theme for myself so that everything I have with AA and AAA batteries, including block 9V, is rechargeable. The rechargeable batteries are also available with the charger at Galaxus. And the charger is not expensive, it's definitely worth it. As I need around 60 batteries for the Lego railway, it's definitely worth it. One box needs 6 AAA batteries, the remote control needs another 3. If you have that a few times, the purchase is already worth it. The advantage if the battery is not installed is that if it were to go bad, which every battery does, the whole Bluetooth box would become useless. That can't be the point, as this is the most expensive component of a LEGO train today. So I can simply replace bad rechargeable batteries if necessary. But by the way, I've been using Varta rechargeable batteries size AAA for years for the box, remote controls and also AA for other devices I have. They last well and are quite long-lasting, I haven't had to replace any yet.