At present mainly has the Li - MnO2 battery and the Li-SOCl2 battery two big kinds.
The Li £ MnO2 battery is the primary battery with the lithium as the negative electrode, the MnO2 as the positive electrode and the organic solvent as electrolyte. The main feature is the high voltage: the nominal voltage is 3v(2 times that of the common dry battery); the expiration discharge voltage is 2v, the specific capacity is high; the discharge voltage is stable and reliable; the shelf life is more than 3 years, the self discharge rate is low (the annual one ¡Ü2 £¥ ); the working temperature ranges from £ 20¡æ to £« 60¡æ.
The battery can be made into different shapes (rectangle, cylindrical and Coin) to meet the various requirements.
The Coin Battery is often used in clocks, calculators, electron notepad, audiphone, electronic game machines, IC card, standby power sources, etc.
The Li-SOCl 2 battery is the type with the highest specific energy, which can reach the level of 500Wh/kg . Its nominal voltage is 3.6v; when it discharges at the mediate current, the voltage is quite stable at 3~4 v(it can discharge stably with little changes within the 90% capacity). The battery can work at the range of £ 40¡æ ¡«£« 85¡æ, while at £ 40¡æ, the capacity is about 50% of the one at the normal temperature. The self-discharge rate is low( the annual one ¡Ü1 £¥ ), and the shelf life can reach as long as more than 10 years.