World's Largest Capacity Nokia Lumia 520 Battery - Zerolemon Nokia Lumia 520 4700mAh Battery

I have their new slogan ready: "Feel like it is 1998 again by creating a Nokia phone as large as a VCR!"
 
It's size is barely noticable... lol
I think this is not made for consumer use... I can't imagine who would buy a brick add-on to a phone for consumer using.