Li ion 21700 battery
What is a 21700 Battery?
A 21700 battery is a common lithium-ion battery named according to its size specifications, with "21" indicating a diameter of 21mm and "700" indicating a length of 70mm. Compared to the traditional 18650 battery, the 21700 battery offers a higher capacity and longer runtime, making it widely used in various fields.
Applications of 21700 Batteries
Due to its high energy density and large capacity, the 21700 battery is widely used in several areas, including:
- Power Tools: High-performance power tools, such as drills, saws, etc.
- Electric Vehicles (EVs): Brands like Tesla use 21700 batteries as a power source for electric vehicles.
- Electric Scooters: Many high-end electric scooters use 21700 batteries for extended range.
- Electric Bicycles (eBikes): These batteries provide strong power support for electric bicycles.
- Portable Power Stations and Power Banks: High-capacity portable power devices often use 21700 batteries.
How Much Does a 21700 Battery Cost?
PKNERGY offers tiered pricing for 21700 batteries, with lower prices for higher purchase quantities. PKNERGY's MOQ and starting prices are competitively positioned in the market.
Do You Offer Other Brands of 21700 Cells?
Yes, in addition to PKNERGY-produced 21700 cells, we also cooperate with well-known manufacturers such as EVE, Samsung, and others. If you need these cells for battery pack assembly, we can assist with that as well.
What Is the 21700 Battery's Outer Shell Made Of?
The 21700 battery’s outer shell is typically made from either steel or aluminum, designed to protect the internal chemical materials and ensure safety. Steel-cased batteries are used in high-performance devices due to their superior pressure resistance and durability, while aluminum-cased batteries are lighter and commonly used in portable devices and consumer electronics.
Is a 26650 Battery Bigger than a 21700 Battery?
Yes, the 26650 battery has a diameter of 26mm and a length of 65mm, whereas the 21700 battery has a diameter of 21mm and a length of 70mm. The 26650 battery has a larger diameter but a shorter length compared to the 21700. As a result, the 26650 typically has a larger capacity and stronger power output, but may not be as versatile in terms of device compatibility as the 21700.