As one of its daily deals, Yugster offers this External 5,000mAh Rechargeable External Battery Pack for $14.97 Coupon code "FreeYugBuck" cuts it to $13.97. With $5 for shipping, that's $4 under the lowest total price we could find for a similar battery pack elsewhere. It functions as an emergency backup power source for cell phones, tablets, and other devices. It includes adapters for Samsung, Apple, PSP, HTC, and more. Deal ends January 12 at 6 am ET.