Apple iPhone 6 (S&D) AT&T

When these Apple IPhones are refurbished, are new batteries installed?

The batteries are checked to make sure they have good remaining life.

If you are looking for a new battery as part of the refurbishment process, you will need to buy directly from Apple.
http://www.apple.com/shop/browse/home/specialdeals/iphone

What is the memory on these phones???

It is kind hidden there.

Capacity 16GB