No, I don’t have that subject title wrong…
Here’s a picture I like against all the rules.
This is a pean of praise to something that is so extremly useful in our lives; we just could not get along without these little cylinders. Could one have imagined, a few decades ago, that one could carry stored energy along in tiny little packs, that would then faithfully deliver a steady supply to it to whatever one wanted to keep working…!
I want to be safe and secure. To this end, I lock my front door when I am away, or asleep. But how secure IS the front door?