Do you ever wonder what it would be like to live in Space?
Yes, I have; the boundless, final frontier. There's an exercise for school kids to pack for Mars.  It's pretty fun.
That's fantastic! What do the kids have to do to get ready to go to Mars?
They have a weight limit and they have to choose what to take with them.  Of course, if you forget the batteries, well you're stuck.  They're way into that Star Trek stuff.
I like Star Trek, but I prefer Star Wars.  If I went to Mars, I'd probably have to take a couple of books.
Star Wars is more recent, but Star Trek was more original.  Take a Kindle, books are too heavy.
But a Kindle would need a charger and batteries. As long as I can get light from somewhere, I can still read my book.
You'd have charging available on a ship and Kindle batteries can't be replaced.
Only if I remembered the charger. It's hard for me to remember those things.  Irreplaceable batteries are a problem.
It's just a cord to charge the Kindle - 
I know, but I'd be thinking about other things that seemed more important.