Rebuild battery wall light?

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I have a room where 4 lamps can be connected to the 230V mains. These are turned on and off with a switch. Now I would like to connect one of these https://www.amazon.de/...B00B0FV4FE lamps to it. Each lamp runs on 3x AAA batteries. How can I get it all 4 lamps on the 230V can be turned on and off?

mc

You can tinker the lamps with (old) mobile phone chargers, and then connect them to the 230 volts but Please be careful with that or or let yourself be helped by someone who knows something like this.

My mom has decocked sp, the funzen also with 4.5 volt, because I synonymous old handynetzteile ran tinkered. Only my nightlight bobs, that still funzt with three (achtung word game) mini-cells