1) Lithium battery is a rechargeable battery made of lithium cobalt oxide as its main raw material. It is characterized by high energy conversion, high voltage per cell, large capacity (in the same volume). Light weight. Battery has no memory. Currently the most environmentally friendly battery. But it is more expensive than other batteries. Plus the energy is large, when used, it is generally not a very large capacity battery. There is a certain risk of explosion and fire. Of course, with the development of technology, protection The circuit is rationalized, and now the power car has also adopted lithium batteries. 2) Ordinary batteries are lead-acid batteries, which are mainly made of lead plates. These batteries are bulky, bulky, and have memories of batteries. Lead pollution is serious. It is cheap. It can make a large-capacity and high-voltage combination battery. Most of it is used in car ignition battery, machine room backup power supply. Of course, there is danger of fire. At present, the state is controlling small enterprises to produce such batteries to prevent pollution from expanding.