These Powerbag 3000mAh Charging Bags are $39.99 each at Woot with $5 shipping. This is the lowest price we could find on these bags by $60. A messenger bag is available in black or grey and a shoulder sling bag is available in red, both with limited stock. Each bag can hold a 16" laptop, has a built-in battery and come with 30-pin Apple, microUSB, and miniUSB connectors and a USB port for charging devices. Sales tax is not charged in most states.