Got my two Joye 510 starter kits a couple days ago from cignot. I'm having trouble making sense of what I was sent (x2) for charging. Of course I got the AC charger. The other piece I got was an AC plug with a USB socket at a right angle. Not sure what that's for (a charger case I didn't buy?) or why it would come with the basic kit. I'm kind of surprised I didn't get anything USB-to-battery. Might my order have been assembled wrong (since I know there are a ton of cignot 510 customers here)?