As its name implies, this power bank uses Samsung battery cell to offer up to 10,400mAh in capacity. There are two USB ports, one of which delivers 2.1A of power for fast recharging. Connect a smartphone or tablet and the iPower 10400s will begin to charge the device. Bundled with a micro-USB cable, it also has a built-in sensor that automatically shuts down once the device is fully charged.
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