Never be without power again with this emergency cell phone battery that less than 1/4" thick. Simply plug in the super slim battery and it will keep you talking for up to two hours (depending on phone model and remaining emergency battery power)! This little dynamo has a 5-year shelf life and can be used for long or brief calls as needed, the remaining power is available for years! This charger is a one use charger made out of 4 batteries, Lithium Cell 3V (CR2450), and a Nokia connector.This jack attached to unit works with many popular phone models,such as Motorola, Samsung, Siemens, Sony Erisson, Philips and Nokia and all cell phones . When power is depleted simply dispose of the used emergency cell battery. This compact overall size of the bag is 7,5x7,5cm, with a hanger of 3x2cm.can be carried in a handbag, briefcase, fannypack or shirt pocket. Available in red.