000 Mah Keyring Chain Powerbank in Silver. Compact 1.000 Mah Lithium Battery Stored in a Lightweight Aluminium Metal Case with Keyring Chain. an Emergency Back Up Battery to Charge Your Phone Up to 50%. the USB Output with 5V & 1A Allows the Use on Any Mobile Device. Output 5V & 1A, Input 5V & 1A. Minimum Quantities Apply.