Pisen Electronics via Amazon offers the Pisen 10,000mAh Lightning/USB Slim Power Bank in Red for $24.99. Coupon code "SQZHK4UB" cuts the price to $15.49. With free shipping for Prime members, that's $10 off and the best price we could find. The power bank itself can be charged with Lightning or microUSB inputs and features a USB output. Deal ends March 3.