Collection: 21700 Batteries

The 21700 battery is a lithium-ion cell that measures 21mm in diameter and 70mm in height, making it a larger option compared to its smaller counterparts like the 18650. 

While it may resemble the 18650, the 21700 offers more power, greater capacity, and is gaining popularity in various high-demand applications.

Like all cylindrical lithium-ion batteries, the name is derived from its dimensions: diameter first, followed by height (21mm x 70mm).

Common use cases

21700 batteries are ideal for a wide range of applications where high power and extended run times are essential:

• Electric Vehicles (EVs) – Powers electric cars, e-bikes, and e-scooters, offering a more substantial energy source for longer trips and faster recharge times.
  
  
• Power Tools – Drives tools like drills and saws with higher energy output and extended runtime, making your work smoother and more efficient.
  
  
• Flashlights and Torches – Keeps your outdoor lights shining brighter and longer, offering a reliable power source at nighttime.
  
  
• Vapes – Used in high-drain devices, 21700 batteries deliver longer, more consistent vaping sessions.
  
  
• Laptops and Portable Devices – Powers your tech for longer, reducing the need for frequent recharges during work or travel.
  
  
• Solar Storage Systems – A great choice for off-grid applications, providing energy storage that can handle frequent charging and discharging cycles.
  
  
• Medical Devices – Suitable for devices that require consistent power and are often used in critical settings.

Why Use 21700 Batteries

The 21700 lithium-ion cells are a popular choice for industries that need reliable, high-capacity power due to their higher capacity and energy density, providing a clear advantage over smaller battery types, such as 18650. Their larger size and better capabilities make them useful for tasks that require longer runtimes, higher energy demands, and greater reliability. Some of the key reasons to choose 21700 batteries include:

• Higher Energy Density – The increased size allows 21700 cells to store more energy, providing longer runtimes without requiring an increase in the number of cells.
  
  
• Efficient and Long-lasting – With a lower self-discharge rate and high performance, 21700 batteries are efficient, long-lasting, and easy to store for long periods without significant loss of charge.
  
  
• Compact and Powerful – Despite their larger size, they remain relatively lightweight and can deliver substantial power, making them an excellent option for portable devices.
  
  
• More Capacity for Larger Devices – Their larger size makes them ideal for high-drain devices, such as electric vehicles, power tools, and solar storage systems, where greater power is required.
  
  
• Sustainability – Lithium-ion batteries, such as the 21700, are generally more sustainable than older lead-acid options, with a lower environmental impact and improved recyclability.
  
  

How powerful are 21700 Batteries?

Two key specifications determine the power of a 21700 battery – capacity and maximum continuous discharge.

• Capacity (mAh): This indicates the amount of energy the battery can store. The higher the capacity, the longer the battery can power a device. If you need a longer runtime, opt for a higher mAh.
• Maximum Continuous Discharge (A): This measures the amount of power the battery can deliver continuously without overheating. For devices that require a significant amount of power, such as power tools or electric vehicles, a higher discharge rate is essential.
  
  

The most powerful 21700 batteries available today typically offer a capacity of up to 5000mAh and a continuous discharge of 30A, making them an ideal choice for high-demand devices.