1.ULTRA HIGH CAPACITY POWER BANK-50000mAh/185Wh(TSA are not Approved for Airline Travel/external battery charger) adequate supply for your laptops,phones and tablets,K2 portable battery can charge your iPhone 6 Plus nearly 11 times,iPhone 6 more than 17 times,Galaxy S6 almost 11 times,no trepidation about power shortage, let you charge your devices any time,and facilitating your travel life more beautiful.This This Battery Pack Can Be Recharged in Just 6-8 Hours. 2. MULTI-FUNCTIONAL INTERFACE-It Has 6 Output Ports. One 20V/3A for Laptops, One 12V/2.5A for Digital Cameras, Two 5V/2.1A and Two 5V/1A For most of Smart Phones, iPad, Tablet and More USB-Charged Devices. It can charge several devices simultaneously and fast. laptop connector contains Lenovo, DELL, Toshiba, SONY, HP and etc. make you charge your laptop anytime, anywhere. And the best protecting devices making you use it under more secure and more assured conditions. 3.IMPROVED SAFETY TECHNOLOGY-Constructed with Lithium-ion Polymer, Battery Cells built-in 6 security protections to ensure, make it safety use and 1000+ recharge cycles. Keeping constant power output for charging the devices, also with preventing overcharge/over discharge/overvoltage/overcurrent/short circuit function and restoring protection.