As a Brad's Deals exclusive, this PowerNOW! 5200mAh Portable Charger Power Bank drops from $20 to $17 with our coupon code BRAD2161 at Maxwells Attic. Shipping is free, making this the best price we could find on any similarly powered portable charger by at least $3. Plus, this power bank uses genuine Samsung batteries, has an LED power indicator, and a built-in flashlight. It also comes in several colors. Sales tax is not charged in most states.