Today only, Groupon offers the Lenmar Battery Case for iPhone 5 for $49.99 with free shipping. Choose from 3 colors (rubberized black, metallic red, or glossy white).

What makes this deal hot:
You save $40 off the retail list price. That's the lowest price we could find currently.

What this does & Why you need it:
Features a slim, lightweight case with built-in battery (2,300mAh battery) that protects iPhone 5.