10000mAh Power Bank using high-quality Li-polymer electric core and Ultra Slim Design, weighing just 181 g and only 14mm thick. Grippy design that is easy to hold, easy to toss into a bag and incredibly portable. Adopts our advanced intelligent controlling IC, higher quality, safer and more reliable, powerful and longer-lasting life after 100% checked and continuous aging test. The 2 usb output ports, can fast charge 2 devices at the same time, The portable charger can fully refill the battery itself in 6-8 hours at 5V 2.1A and meet the charging needs of mobile phones, tablets and other electronic devices. Four led lights show the current remaining power of the item(25%~50%~75%~100%), easily press the power button to turn it on or off. Built-in smart protection system, the USB battery pack ensures complete protection for you.