

The other UK one is “I’m going to spend a penny” meaning I’m going to the loo, (I assume this phrase is to do with bathrooms being penny operated/gated).
What I want to know is does the phrase also then lead to referring to urinating as Peeing as when referring to coinage we use both P (pronounced “pee”) and pence


Which raises an interesting point:
Could you parachute spent batteries over designated areas for collection and reuse to extend range? (probably minimally, and any gains would be offset the weight of the battery release mechanism)
Still very fair point re hydrogen