Dell Home, via its Member Purchase Program, offers its Dell 18,000mAh Power Companion Portable Battery Pack for $113.99. Coupon code "DEAL35" drops it to $86.44. With free shipping, that's the lowest price we could find by $29. It features two USB ports and LED charging indicators. Deal ends July 6.
Note: Dell's MPP is available to select groups, including students, government employees, military (active and retired), credit union members, and health care workers.