Kyasi Power To Go 5000 mAh USB Battery Pack, Silver 5000mAh of charging capacity. Charges all iPhone two or two and a half times, a Galaxy S3 and S4 one full charge and another 33% roughly Other devices may vary - but all improve after a quick charge on a Power To Go power bank. Input: 5V / 1.5A; Use a 1.5A adapter (not included) for fastest charge times (8 hours) A simply designed and beautifully compact device that is both functional and not an eyesore for your desk. A brilliantly engineered Lithium Polymer power core guarantees over 500 charge cycles and with easy usability. Simple, yet reliable power. LED indicators built to show you the remaining battery as you use the device itself.