BeartwoDirect via Amazon offers its Beartwo 10,000mAh Dual-USB Portable Solar Power Bank in Black for $26.88. Coupon code "PWJ4J5NQ" cuts the price to $17.74. With free shipping for Prime members, that's $9 off and the lowest price we could find, although we saw it in our January mention for $8 less in Blue. It features two USB charging ports, an LED flashlight with three modes, and a water resistant shell.