RAVPower 6700mAh Power Bank with iSmart 2.0 Technology - Black

While both ports will output 2.4A, when both are used simultaneously, they will only output a combined maximum of 3.4A. With a capacity of 6700mAh, this battery pack is compatible with virtually all devices that may be charged via USB. It is equipped with a four-LED battery level indicator that helps to monitor its remaining charge, it recharges in around 5-6 hours using its 2A micro-USB input and a 2.4A adapter, and it uses iSmart 2.0 charging technology to identify and properly charge specific devices. You'll be able to recharge an iPhone 7 up to 4.5 times, a Samsung Galaxy S7 up to 3 times, and an iPad mini up to 1.8 times.