Groupon is offering the Mota Apple-Certified Battery Case for iPhone 5/5s for $34.99 plus free shipping. Comes in your choice of five colors (blue, green, pink or black). You save 65% off the retail price. Limit 3 per person but may buy 2 more as gifts.

This iPhone case almost doubles battery life your iPhone and offers protection against drops. Built-in 2,400mAh extended battery delivers up to 8 hours of talking, 8 hours of web browsing, or 255 of standby time.