The earliest lithium battery used in pacemakers. Lithium self-discharge rate is very low, the discharge voltage is flat and so on, making implantation of the human pacemaker to long-term operation without recharging. Lithium batteries are generally higher than the nominal voltage of 3.0 volts, more suitable for integrated circuit power supply. Manganese dioxide battery, it is widely used in calculators, digital cameras, watches.
In order to develop more excellent performance varieties, people have studied a variety of materials to create an unprecedented product.
1992 Sony successfully developed lithium-ion battery. Its practical, so that people's mobile phones, laptops, calculators and other portable electronic devices, weight and size greatly reduced.