Update: The promo code has expired and the price has increased slightly to $25.99.
Sunvalleytek via Amazon has RAVPower 10400mAh External Battery Pack (RP-PB07 Black) for $35 - $10.50 w/ promo code F742MN29 = $24.50. Shipping is free. Thanks yuugotserved
Note, make sure you select "Free Shipping (5-8 business days)" option to receive free shipping
Price Comparison: Our research indicates that the RAVPower 10400mAh External Battery Pack (RP-PB07) is $5.50 lower (18% savings) than the next best available price from a reputable merchant with prices starting from $30. - Corwin
Deal Editor's Note: Great reviews at Amazon with overall rating of 4.5 (out of possible 5 stars), based on over 1,200 customer reviews. This is now $1 less than it was for the previous +61 Front Page Deal.