Made of high-quality lithium polymer battery, this power bank stable for daily work and long trips 30000mAh capacity con provide up to 7 days of worry-tree power to charge & times of most the Phone Power 3 Devices Simultaneously This power bank has 3 5V3A fast charging output ports, can charge 3 different devices simultaneously at maximum speed. Especially durable when you hove multiple devices that need to be charged Show Your Battery Level Accurately The intimate LED display can show current power left with an accuracy of 1% comvenient for you to schedule the charging time in advance, and no more Whether you need to charge it or not No