Lithium Ion Rechargeable Battery has overcome many shortcomings of conventional rechargeable batteries (NiMH, NiCd). It delivers and maintains a stable operating voltage of over 3.7V even until final discharge. Discharging three times as much voltage as NiCd or NiMH battery, its high energy density enables portable devices to be made smaller and lighter. Also, Lithium Ion Battery provides stable and consistent discharge throughout a wide temperature range with limited self-discharge to less than 10% of the original capacity per month. It has no memory effect that reduces discharge capacity and has superior recharging properties for a service life of about 500 charge/discharge cycles, i.e. much more economical than primary batteries. Lithium Ion Rechargeable Battery is suitable for cellular phones, digital still cameras, portable AV equipment, mobile games, PHSs, PDAs and wireless equipment.