Tony Cooper
Wait a minute! You've said in another post that people call them different things, and that's OK. So if that's OK, then calling the power adapter a "battery charger" is perfectly legitimate by your rules. If it's used to charge the battery, calling it a "battery charger" is logical.

nospam
no, because it's not a battery charger. where do you put the batteries into it? you don't.

Tony Cooper
You're struggling. Where do you put the batteries into this one?

http://www.elec-intro.com/EX/05-15-02/Battery_Charger.jpg

Sandman
You apply the red and black clamps to the battery. You don't "apply" the USB charger from Apple to the battery, you connect it to a Lightning port.

Eric Stevens
So it really is a charger. That's good.