Promotional Power Bank, Ravenswood Slim 2500mAh UL Power Bank - Flight Safe, Our Ravenswood Slim 2500mAh UL Power Bank is perfect for quick charging needs and on the go convenience. With a 2500mAh battery, the Ravenswood Slim Power Bank is safe to bring on a plane while still being powerful enough to quickly charge your device. Input: 5V 1A . Output: 5V 1A . Battey Capacity: 2500mAh . Material: ABS. ... #PWB119 $10.45/each.