Newbie needs HELP!

Looking for suggestions for a quality budget friendly powered usb hub to be used between  my iPhone 7 (using Apple camera C usb cable) & my Peachtree Dac Itx (using its usb input). The dac needs power so I’ve been using the Apple camera C charging port but suppose a separate powered USB hub would be preferable; but don’t know if that’s actually true Any help would be very appropriated. Thx 
Thx but I’m EXTREMELY elated w my Peachtree dac; it’s analog(vinyl like) sound is phenomenal.  I was skeptical reading the unanimously fawning reviews, but happily surprised to find them to be absolutely true & accurate. The Peachtree  Dac itX performs FAR above its  price point. It’s not easy to find tho and I feel very fortunate to have acquired mine directly from Russ @ Peachtree. I encourage you, and anyone to audition this dac for themselves. Cheers, Mike
It sounds like what you want is a USB Power Bank. Specifically, you would power your usb hub via the power bank, and run whatever you needed powered through the hub. The power bank would also allow you to utilize a more stable DC current, compared to the AC coming from the wall.
Here's a power bank suggestion that should work:

Hope that helps.
Oh yes. I believe you are correct Sir & that item should do the trick. Really appreciate your input & help. Thx very much. Cheers, Mike
@courant. One thing I truly hope I’m just not seeing- how can I use that power bank w my set-up ( iPhone 7 >Apple USB-C (camera adapter). USB-C output > dac usb input, & lightening charge cable>USB hub ( which now I’m using a standard plugged into AC outlet USB hub) without automatically charging my iPhone unnecessarily, and causing the dac to stop working? Thx for your help. Mike
You'll probably want to hunt down some form of USB Y Cable that splits power and data. Connect the power section to the hub as needed, and connect the data-only to the dac.

Suggested viewing:

Beyond that, Google is your friend.

Hope that helps.