Dear Lord in Heaven! Where have you've been all of my life PowerBear LLC! I bought this for my dad's AT&T Galaxy S4 which was using a cheap knock-off from eBay. Yeah I know, WAH WAH WAAAAAHHHHH! But seriously though, this is BY FAR the BEST replacement battery I've ever seen/experienced with it. My dad was shocked at how long this battery could hold a charge for. The thickness of it is absolutely not an issue. In fact, it gives the phone a more sturdy feel to it. PowerBear LLC, you've made a powerful impression on me with this battery. I'm bought & sold for your business. Thanks & Happy Everyone. Peace!