When do you use a booster on a Märklin model railway?"

A booster provides more power to the model railway. When many locomotives or even cars with lighting rush over the layout, a booster is the next upgrade step for larger installations.
More power than a track box of the Mobile Station with the power supply has by default a Central Station 3, also a second, for example older, Central Station 2 can already be used as a booster and additional power supply on the layout.
You can always check how much power your layout consumes on the display of the Central Station, either in idle or normal operation.
Under no circumstances should you connect additional power supplies, track boxes, or old transformers to the tracks.
For the Mobile Station 2, there is no booster like for the Central Station, here the only help is an upgrade from a Mobile Station to a Central Station, which has much more power. And if that’s still not enough, then you can also upgrade with a booster.
This video was translated from the original German with the help of AI. A synthetic voice was used for the overvoice.

[@davidogle9247]

Yes! Keep the translations coming!!!

[@dcctrain]

Awesome!

[@henriqueoliveira499]

Excelent information!

[@bohemianh]

what if you have K track?