RND Dock + 2600mAh NFC Standard Battery for Samsung Galaxy S4 (compatible without or with a slim-fit case) (white) Perfect replacement or secondary battery made specifically for your Galaxy S4 Smartphone. Power Protection Circuit included. Eliminates the hassle of removing your case. Supports majority of Cases. Compatible With: Samsung Galaxy S4 | RND Power Solutions products comes in professional retail packaging and offers a 1 year hassle free warranty. Authentic RND Power Solutions products will have our branding on the product and packaging.