Mr_Grumpy

I second this. A more powerful 12V socket adapter is far better than a battery pack.
Like this.

Good bot

My old person trait is that I think I should be able to have anything I purchased repaired/serviced by whomever I wish, with whatever parts they deem acceptable.

Many of the younger generations seem to accept that things don’t last/break easily. I come from a time where there was a wiring diagram for the TV pasted on the inside back cover. Washing machines and other devices often had the schematics included. Repairing your stuff and keeping it running was the norm back then. Even if you couldn’t, you probably had a neighbour who could. Planned obsolescence is a relatively new thing.