Lithium ion batteries have been widely used because of their light weight, large capacity, no memory effect and other advantages. Many digital devices now use lithium ion batteries as power supplies, although their price is relatively expensive. Lithium ion battery has a high energy density, its capacity is 1.5~2 times of that of nickel metal hydride battery with the same weight, and its self discharge rate is very low. In addition, the lithium ion battery has almost no "memory effect" and no toxic substances, which is also an important reason for its wide application.

The lithium battery used in the card machine can make the machine smaller. Now many people are using lithium batteries in the shape of No. 5 batteries, such as 14500 and lithium iron phosphate. The biggest advantage of lithium battery is that it is stable, has a high voltage, and has a very straight discharge curve. It can maintain a relatively high voltage before the power is used up, which is the basis for driving the camera. The current No. 5 alkaline or nickel metal hydride rechargeable battery has a large enough power, but the voltage drops too quickly, which will be lower than the cut-off voltage of the camera and automatically shut down the special machine, so there is no power available.

Compared with traditional battery technology, lithium-ion batteries can be charged more quickly and used longer. Moreover, higher power density can achieve longer battery life and lighter body. The most important thing about lithium-ion batteries for mobile phones is actually two points: good safety performance and long cycle life.

The above is how to choose lithium ion batteries and lead-acid batteries and why many batteries now use lithium batteries? In a word, if you only use electric vehicles in ordinary times, you can consider choosing lead-acid batteries. After all, its price and practicality are relatively high. If you want to pursue the experience of electric vehicles, you can consider lithium-ion batteries. After all, their performance is better.