You'll do happy recipients a "power" of good once your campaign includes the Madison 2200mAh power bank square! This portable, lithium ion battery allows you to charge your smart phone, MP3 player, MP4 and other devices anywhere. With a 2200mAh capacity, 5v-800mA input (DC IN) and 5V 1000mA output (USB OUT), UL CERTIFIED, this fantastic favor includes an auto on/off with overcharging, over discharging, overheating and short circuit protection. It also includes a standard USB connector to charge the battery plus a black gift box! Full Color Imprinting Available!