Resistant, 600D polyester folder with built-in 5,000 mAh external auxiliary battery. In sober design and with original closure, with plenty of storage compartments for business cards, USB sticks, plus a touch screen case for smartphones and LED charge indicators. Including a 65 sheet notepad and a dual support for 7 inches and 9.7 inches tablets. The easy access to the charging station via micro USB cable - included- make of this folder the perfect gadget for business and studying. The capacities shown in all our external auxiliary batteries are real, all of them incorporating non-recycled, grade A batteries, with a service life of at least 500 charging cycles, and complying with CE regulations. In addition, they are manufactured according RoHS standards, and in compliance with the following safety requirements: Power bank overcharge protection system. Complete discharge protection system, which increases the durability of the power bank. Blocking system to prevent short circuits. Constant charging transfer system, in accordance with the capacity of the target device.