As one of its daily deals, Yugster offers the Noontec Apple-Certified 5,000mAh Battery Pack in Black or White, model no. POLO5000, for $19.97. Coupon code "FreeYugBuck" cuts it to $18.97. With $5 for shipping, that's the lowest total price we could find by $16. It will charge any device with an Apple 30-pin or microUSB input. Deal ends June 21.