The earliest application of lithium-ion batteries in the cardiac pacemaker. Lithium battery self-discharge rate is extremely low, the advantages of discharge voltage flat, which makes the pacemaker implantation in the human body for a long time operation without recharging the batteries. Lithium batteries tend to have higher than the nominal voltage of 3.0 v, is more suitable for integrated circuit power supply. Manganese dioxide batteries, is widely used in calculators, digital camera, a watch.
In order to develop more excellent performance of varieties, people of various materials are studied, so as to create an unprecedented products.
Sony in 1992 successfully developed lithium-ion batteries. Its practical application, make people's mobile phone, notebook, calculator carry type electronic equipment such as less weight and volume.