Power up your promo with the portable lithium Ion power bank! This lithium ion charger holds 2,000mAh of power, strong enough to recharge your cell phone when the battery is running low. It recharges using a micro USB input cable (included). It charges your cell phone through its USB output port using your phone’s own charging cable (not included). It’s guaranteed for up to 500 charges and has an output of 5V/1A. Complete instructions are included. These are not recommended for use with tablets. The power bank and all of its components, standards and performance comply with the rigorous standards of the UL, the premier product safety, certification and testing laboratory in the world. A Blue LED light indicates charging status.