Re: "Relatively easy != easy."
"a Hydrofloric Acid and Cream Cheese battery with an operating temperature of 200c, which I'd suggest has f**k all chance of ever moving outside my head " @John Smith 19
Are you aware of the sodium-sulphur battery, with an operating temperature of 300C or more? At that temperature it's compatible with Samsung smartphones, Boeing dreamliners, and maybe more, but was more aimed at stationary storage and (for a while in the UK in the late 1970s) Transit-sized electric vehicles. Prince Philip had one in his electric Bedford CF taxi.
Anyway, ledswinger's list of hinder factors is an interesting illustration of why business leaders and their Westminster puppets have been so keen on a bonfire of the red tape (at least pre-Grenfell, maybe it will change now). Who needs the British Standards Institute anyway (it presumably isn't gonna be ISO/CE rules much longer).
You know which icon goes here, innit.