power-innovation via Amazon offers the Maxboost Pulse 10,000mAh External Battery Pack with Digital Display in Piano Black for $38.95. Coupon code "WOOTBATT" drops it to $27.99. With free shipping, that's $11 off and tied with our mention from two weeks ago as the lowest total price we could find. It's compatible with a range of devices and features a digital display and two USB ports.