Groupon offers the iCanonic Elite Extended Battery Case for iPhone 5 in Black or White for $34.99 with free shipping. (The Digital Guy via eBay charges the same.) That's tied with our mention from three days ago and the lowest total price we could find by $15. This rechargable case features a 2,000mAh battery, microUSB input, slim design, and LED battery level indicator. Deal ends June 28 at 12:59 am ET.