This battery charger case has a 10000mAh capacity and is designed to protect your iPhone on the go. Simply click the switch for 3 seconds to start or stop charging. It's perfect for travel, work, and emergencies. Please follow the instructions for proper use and contact us with any questions. Specs: Class A lithium ion polymer battery, 5V 1500mA input and output, 0-45 degree working temperature. The conversion rate may result in a slightly lower capacity of 6000-8000mAh. Thanks for understanding.