Simply Mac at 4475 Roswell Road #420, Marietta, Georgia.

To replace the battery on my Iphone 6 that Apple itself had authorized, REGARDLESS OF ITS CONDITION, the store wanted to charge me $19.99 to diagnose the battery and determine if it needs replacement or not and then go from there! I can run the battery diagnostics with a free app, thank you!
The tech with his unintereste look was implying, "Don't you see we are inundated with replacing Iphone batteries for free? We are a private business (hello!) and need the revenue, mind you!" I promptly took my business to Apple Store to never look back at Simply Mac.