1. High operation voltage, Li-ion batteries produce 3.7 volts. 2. High energy density. 3. Long cycle life, more than 300 charge/discharge cycles (80% capacity remained). 4. Minimal self-discharge, less than 10% monthly. 5. Be charged & discharged at anytime because of non-memory. 6. Environmentally compatible. 7. High level of safety, vision Lithium ion batteries catch no fire and cause no explosion in breaking experiment, with acupuncture, smash, drop, and so on.