Lenovo 5000mAh Portable Power for Tablets or Smartphones – Link

Lenovo has this for $29.99. Drop the total to $17.99 shipped with code: USP1JA456288

“The Lenovo PowerBank PB410 is a must-have power solution for the smartphone or Android tablet user. No bigger than your average smartphone, the PowerBank delivers plenty of on-the-go power for your mobile device.Lenovo certified Lithium Polymer Battery Cell Intelligent charging technology for enhanced safety Ultra-portable super-slim design makes it easier to carry around High-quality full-metal shell protects battery pack from sudden shock”

(Thanks DZ for the tip!)