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https://www.ecolithiumbattery.com/product-category/lithium-ion-batteries/

Lithium Ion Battery
Lithium-ion batteries, also known as lithium-ion batteries, are the newest of the three main types. They are rechargeable batteries commonly used in portable electronics. For example, the battery in a cell phone is a lithium-ion battery.

While lithium-ion batteries are the most expensive of the three, they tend to pay for themselves quickly, which is their main advantage. Premium Li-Ion batteries can be charged twice as often as NiMH batteries.

Another advantage of lithium-ion batteries is constant power output. There is no loss of performance when the battery is discharged. Lithium-ion batteries also charge very quickly; typically within 1-3 hours. The icing on the cake is that Li-Ion batteries are 30% lighter than Alkaline and NiMH batteries, making them ideal for portability. What is a lithium-ion battery?
Lithium-ion is the most popular rechargeable battery chemistry today. Lithium-ion batteries power the devices we use every day, such as our cell phones and electric cars.

Lithium-ion batteries consist of single or multiple lithium-ion batteries and a protective circuit board. Once one or more battery cells are installed in a device with a protective circuit board, they are called a battery.

What are the components of a lithium-ion battery?

Electrodes: The positively and negatively charged ends of a cell. connected to the collector
Anode: Negative
Cathode: Positive
Electrolyte: Conductive liquid or gel
Current collectors: Conductive foils on each electrode of the battery, connected to the terminals of the battery. Battery terminals carry current between the battery, the device, and the energy source that powers the battery
Separator: A porous polymer film that separates electrodes while allowing lithium ions to be exchanged from one side to the other

How do lithium-ion batteries work?
In a lithium-ion battery, lithium ions (Li+) move internally between the cathode and anode. Electrons move in opposite directions in an external circuit. This migration is what makes the battery power the device—because it draws current.

As the battery discharges, the anode releases lithium ions to the cathode, creating a flow of electrons that helps power related devices.

When the battery is charged, the opposite happens: Lithium ions are released by the cathode and received by the anode.