I was so sick of replacing batteries on my Hive connected radiator valves, even though I switched to rechargeables, I kept thinking "if only there was a mains-connected adaptor that mimics 2 AA batteries with a flat cable, then at least I wouldn't have to keep changing the batteries on the valves that are close to a plug." Turns out, this DOES exist. I found one called the Aieve battery eliminator (find at a retailer near you – no official web site that I could find) but there are many brands. 🤷♂️
@torgo I always wonder about magical tech like this - so simple to put power through a dummy battery like this but also so cheaply built and they look like they'll fall apart with a hard stare.
Yet also, I've been running my DSLR webcam off a dummy battery with exactly the same plug and connector for 5 years and I've not burnt the house down yet