To save connecting a power supply to the mains (outlet in inconvenient location) I'm thinking of buying this and connecting it to a powerbank and then to a single train controller. Opinions welcome as to if this is viable

Paul-H wrote:How much are they
As long as you don't need more than about 1 Amp you could build one yourself with a 99p buck converter found on the likes of eBay, I built a couple myself for powering cameras on location, they were turned down to 7.4v but IIRC the buck converters could boost to 24v being fully adjustable.
Something like this one would do the job
https://www.ebay.co.uk/itm/5V-9V-12V-Bu ... 3378484068
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