I finally treated myself to a shiny Apple MacBook Pro last year after wanting a Mac for quite some time, and I love using it in conjunction with my Filofaxes. However, the charger has recently developed some kind of fault and stopped working. At that point, I grumbled at myself as there was only 50% left of battery power, but luckily we discovered that my husband has one from a previous machine until I manage to get to a store. With all the storms and flooding, some people have been without power and I suppose it's made me think about how reliant we are on regular access to electricity.
I love how my binders don't need charging, and are always ready as long as I have a writing implement and some paper!