What is 21700 cylindrical battery cell

What is a 21700 battery?

The 21700 battery is a cylindrical lithium-ion battery with a diameter of 21mm and a length of 70mm. It offers a nominal voltage of 3.7V and a capacity of up to 5,000mAh, making it a powerful and efficient energy source. Its energy density ranges between 250 Wh/kg and 300 Wh/kg, depending on the chemistry.

How big is a 21700 cell?

21700 => ~21mm in diameter and ~70.0mm long These dimensions vary between manufacturers. However, the industry is advancing rapidly and looking for cost savings, hence larger cell formats. Tesla particularly uses Cylindrical cells in their Electric Vehicles. As per recent announcement Tesla is moving to 4680 from 21700 and the older 18650.

Are Samsung 21700 batteries a good choice?

As energy storage and electric mobility sectors rapidly expand, companies are increasingly focused on battery performance, safety, and reliability. Among the most trusted options in the market today are Samsung 21700 cells, known for their superior energy density and long cycle life.

What is the energy density of a 21700 battery?

Depending on the specific chemistry, such as NMC or LCO, the energy density of the 21700 ranges from 250 Wh/kg to 300 Wh/kg. This makes it a preferred choice for applications requiring compact yet powerful energy storage solutions. For example: NMC Lithium battery: Energy density of 160–270 Wh/kg, cycle life of 1,000–2,000 cycles.