Newegg offers the RAVPower Dynamo-On-the-Go 10,000mAh External Battery Pack in White or Black, model no. RP-PB04, for $25.99 with free shipping. That's $74 off list and the lowest total price we could find, although we saw it for $8 less four days ago. It features an LED status bar, dual outputs to charge two devices at once, and four connectors compatible with iPhone and iPad, as well as HTC, Samsung, and other smartphones.