Newegg is offering the Luxa2 EnerG 8800mAh Portable Power Bank / External Battery for a good price.

You can charge your smartphone 3-4 times with this

Next best price on Google is $36.94 shipped

1. Newegg Price is $25.99 Shipped

2. Rebate Price : -$10.00 ( Exp : 8/18/14 )

Final Price : $15.99 Shipped After Rebate