TechRabbit offers the refurbished Mophie 5,000mAh Powerstation Plus Portable Battery Pack in Black for $14.99. Coupon code "DNMPP5" drops it to $9.99. With free shipping, that's $40 under the best deal we could find for a new one. This external battery works with microUSB-equipped mobile devices and smartphones. Deal ends May 19.

Note: A 1-year TechRabbit warranty applies.