History #

The 20650 battery size is a lithium-ion battery format that was introduced in the early 2000s. It is a relatively new battery type and was designed to provide more power than other battery formats of the same size. The 20650 battery size is a cylindrical battery with a diameter of 20 mm and a length of 65 mm.

Typical Chemistry #

The 20650 battery size is typically made up of a lithium-ion chemistry. This chemistry is made up of a lithium-ion cathode and an anode typically composed of graphite. The electrolyte is usually a mixture of organic carbonates, such as ethylene carbonate or propylene carbonate, and a lithium salt. This combination of materials provides high energy density, long cycle life, and low self-discharge.

Typical Use #

The 20650 battery size is commonly used in a variety of electronic devices, including laptops, cell phones, and digital cameras. It is also used in some electric vehicles and is becoming increasingly popular in portable power banks and other mobile devices. The 20650 battery size is becoming increasingly popular due to its high energy density and long cycle life.

Design #

The 20650 battery size is designed to provide a high energy density and long cycle life. The battery is composed of a lithium-ion cathode and an anode typically composed of graphite. The electrolyte is usually a mixture of organic carbonates and a lithium salt. This combination of materials provides high energy density, long cycle life, and low self-discharge.

The 20650 battery size is designed to be lightweight and compact. It is designed to fit into small spaces and provide a high level of power. The battery is designed to be safe and reliable, with built-in protection against overcharging, over-discharging, and short-circuiting. The battery is also designed to be durable and able to withstand high temperatures and vibrations.