Love the battery analogy. Energy gain, energy loss. I’m going to try this out and see if it can switch my mindset about work - at the moment, a lot of it seems to be energy loss!

I think that the way we spend our time is also mostly personality-dependent. Maybe that explains why given ten minutes spare, some people do a bit of MOOC, and others play candy crush or just stare and fidget ... it’s a way of giving the mind a bit of a break!