We know you've just been looking for an excuse to post in the Coffee House so you can hang out with all the Kool Kidz.
If the toilet is where you do most of your reading, then it is an important issue. No forward planning is required - books and magazines don't have batteries. Having had a recent ***** up of leaving my laptop power cable behind after a visit to my mum's, I am all too aware of this. I did a lot of reading of physical books until the postman arrived with the missing cable.
NB - Despite appearances I did read the whole post, not just the first and last lines.