Lithium ion battery: Lithium ion batteries have the advantages of light weight, large capacity, and no memory effect, thus obtaining

　　Universal application - Many digital devices use lithium-ion batteries as power sources, although their prices are relatively expensive. Lithium ion batteries have a high energy density, with a capacity 1.5 to 2 times that of nickel hydrogen batteries of the same weight, and have a very low self discharge rate. In addition, lithium-ion batteries have the advantages of almost no "memory effect" and no toxic substances, which are also important reasons for their widespread application. Additionally, please note that lithium batteries are generally labeled with English 4.2V lithium battery, 4.2V lithium secondary battery, or 4.2V lithium rechargeable battery on the outside. Therefore, when purchasing batteries, users must carefully read the markings on the exterior of the battery block to prevent cadmium nickel and hydrogen nickel batteries from being mistaken for lithium batteries due to unclear battery types.

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