This Rayovac Portable 10,000 mAh Dual USB Power Bank drops from $29.99 to $18.99 to $15.99 when you apply our exclusive code BRADPWR15 in your cart at iTechDeals.com. Plus, the shipping is free. This is the best price we could find for one of these power banks by $3 before adding shipping elsewhere. The 10,000 mAh battery can recharge an iPhone 7 five times or a Samsung Galaxy S8 Edge three times. There is no sales tax (except NJ).