What are the differences between Ni-MH battery and lithium battery?

What are the differences between nickel-metal hydride batteries and lithium batteries? 1. Volumetric rechargeable lithium battery has the advantages of small size (relatively), light weight, low self-discharge rate, and no memory effect compared with ordinary nickel-cadmium/nickel-metal hydride batteries, and is widely used in many new mobile devices. The batteries of mobile devices such as mobile phones, notebook computers, and PDAs that we usually use have gradually been replaced by lithium batteries. The memory effect of the Ni-MH battery is not very obvious. One thing is that when it is urgent to use, it is not necessary to charge the battery after it is discharged. For normal use, it is best to discharge the battery before sufficient. 2. Electricity Lithium battery has a large specific energy and a small battery; the voltage of a single lithium battery is 3 times that of a nickel-hydrogen battery; there is no memory effect, and it can be charged as needed. But it can't be charged at one time, so too many charging and discharging times will affect the life of the battery. Lithium storage batteries are not suitable for long-term storage, as they will permanently lose part of their capacity over time. It is best to store it in the freezer of the refrigerator after charging 40%. 3. Charging method The charging requirements of lithium batteries are different from nickel-cadmium/nickel-metal hydride batteries. The single voltage of rechargeable lithium batteries is 3.6V (some battery blocks may be nominally 3.7V). With the full charge, the voltage of the lithium battery will gradually increase, which is also a sign to judge whether the lithium battery is full. The general manufacturer recommends that the charging voltage is 4.2V4. The energy density of the nickel-metal hydride battery is between the nickel-cadmium battery and the lithium battery. Between batteries, this shows the transitional product nature of nickel-metal hydride batteries. Because of the difference in energy density, that is, the energy that can be stored in the same volume, lithium batteries are three times that of nickel-metal hydride batteries. 5. Self-discharge Self-discharge refers to the amount of electricity that the battery will lose when it is not in use. The self-discharge of nickel-hydrogen battery and lithium battery is not large, but self-discharge of nickel-hydrogen battery is common. Excessive self-discharge will shorten the battery's service time and end its life early. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Why does the lithium battery explode?