Features: 1) Perfect IT mobile devices together with one set of "I-UP5400" 2) Out of power can be placed at anytime and anywhere 3) Trendy and human friendly design 4) UV coating 5) High capacity, little size, convenient to carry 6) With multi functions and jacklight 7) Design for circuit voltage drop, to improve efficiency, and extend time of power consumption 8) With 5 LEDs indicator, can confirm battery capacity accurately 9) Various circuit protection functions, to ensure the safety and stability of item, such as protection from overcharge, overdischarge, overheat 10) Portable power source special for mobile digital devices,and special power source for camcorder 11) Can recognize voltage (5.3 / 8.4V), for mobile phone, PDA, PSP, PMP, digital camera, camcorder 12) Semi-permanent usage with high capacity and stable Li-on battery to be replaced 13) Necessity for your ubiquitous life "i-UP5400" 14) Do not worry about the shortage of battery power while using mobile devices while your outdoor activities: mountain, beach and lake for hiking, camping or fishing, travel companion on your business trip or backpack trip