USB Chargers

Pretty much. The issue I sometimes have is that some devices require more current than you get from a standard USB jack. For example, you can't charge an Ipad with a standard USB outlet like you might find on a computer or a car charger.

they scare me.

I keep remembering R2D2 plugging into the wrong interface and blowing all his circuits...

after mowing my phone, I hesitate to smoke it.

That was my concern, too. What I take from engineer's answer is that while some may be inadequate, they are equally safe for whatever you hook them up to.

Thanks. I'm all happy again.

Excellent. Happiness is underrated.