Both Ni-MH batteries and lithium-ion batteries are secondary batteries, and they are widely used in various occasions.

　　Ni-MH batteries are divided into high-voltage Ni-MH batteries and low-voltage Ni-MH batteries.

　　The positive electrode active material of the nickel-hydrogen battery is Ni, and the negative electrode active material is metal hydride.

　　So, what are the advantages and disadvantages of Ni-MH batteries that will be replaced by lithium batteries?

　　Advantages and disadvantages of Ni-MH batteries:

　　(1) Ni-MH batteries have greater output power than alkaline batteries.

　　(2) Compared with lead-acid batteries, the memory effect is less obvious.

　　(3) Long cycle life, it can be recycled for more than 300-500 times under correct use conditions.

　　(4) The self-discharge rate is high, and the monthly self-discharge rate of fully charged storage at room temperature reaches 20-30%.

　　(5) The high temperature resistance is poor, and the service life will be quickly reduced if used at a temperature exceeding 45°C.

　　(6) The situation of overcharging has a great influence on the life, and it is dangerous.

　　(7) Contains certain harmful metals or ingredients, which is not good for environmental protection.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　As a relatively mature product, the price of Ni-MH batteries is much lower than that of lithium batteries. However, with the rapid development of the lithium battery industry, the trend of Ni-MH batteries being replaced by lithium batteries is becoming more and more obvious.