12000mAh Double USB Portable External Battery Power Bank Portable Charger Panel For Mobile Cell Phone - Black. The perfect back up power bank for anyone who spends a lot of time on the road. This massive battery pack stores up to 12000mAh worth of juice. Enough to fully recharge most smarphones up to 8 times when capacity is at 100%. The built-in light indicators lets you know how much power is stored so you know when to refill. With dual USB ports, you can charge two devices at the same time. One port (1amp) is ideal for smartphones and small devices. The other port (2.1amps) is great for powering up your tablets and larger devices. Quickly double clicking the power button will activate the power bank's built-in flashlight. Buy this and Save $5 Off on 12000mAh Double USB Portable External Battery Power Bank for $14.99 with free shipping at Rakuten.com.