NeweggFlash offers the RAVPower Dynamo-On-the-Go 10,000mAh External Battery Pack in Black, model no. RP-PB04, for $25.99 with free shipping. That's $74 off and the lowest total price we could find, although we saw it for a buck less in November. 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. Deal ends September 24.