This is the most recent one I think but Mophie has several other (RED) products - cases for older iPhones, power stations... I own three of those in total, and happy with them, plus it's a good cause of course!

The protective, yet light-weight design delivers more than 100% extra battery with the flip of a switch. Made for iPhone 6s/6, this is the ideal everyday case to keep you charged through the day and well into the night. 5% of the retail price from this product purchase will go to fight AIDS with (RED).