Groupon has the uNu Aero 2,000mAh Battery Case for $49.99 + FREE shipping!

Why this deal is hot:
Save 50% off -- that's $49.96 in savings!

What this does and why you need it:
Protect your iPhone 5 or 5s with this protective case that includes a built-in 2,000mAh battery. It presents an additional 100% charge to the iPhone 5 and 85% to the iPhone 5S without removing the case. Complete wired charging with the micro USB cable or wireless charging with the included charge pad. This case is MFi certified by Apple, has a standby switch, LED power indicator, rigid backing, raise-lip edge and weighs just 0.3lb.