1) Powerful, external, portable, universal, intelligent 2) Powerful with long operation time 3) Widely compatible 4) Super thin design 5) Portable and convenient 6) Excellent security and reliability 7) High efficiency of power conversion 8) Electricity-saving function 9) User friendly 10) Memory effect free 11) Long cycle life 12) Rapid charging 13) Fashionable 14) Environmental friendly, economic efficiency