Thiese are Ultra slim power bank that can be used as a power supply to most any electronic device or phones. It comes with a USB to Micro USB cable. This cable is used to charge the power supply.
These covers can be used with laser engravers to create a custom power supply.
These items are aluminum and outsides are painted.
5,000 mAh, Input: 5V=2A (max), Output: 5V=2.1A (max)