The Best Places to Buy Cylindrical Lithium-ion Cell Online and In-Store

Battery Recommendations based on use

What is an Battery?

An battery is a rechargeable lithium-ion (Li-ion) cell characterized by its cylindrical shape and standardized dimensions of 18mm in diameter and 65mm in length. It is one of the most commonly used battery types in high-drain devices due to its high energy density, long lifespan, and efficiency compared to other rechargeable batteries.

Read more

Technical Specifications

• Chemistry: Most batteries use lithium-ion chemistry, but there are variations such as:
  • Lithium Cobalt Oxide (LiCoO₂ - LCO): High energy density but lower discharge rates.
  • Lithium Manganese Oxide (LiMn₂O₄ - LMO): Safer with better thermal stability.
  • Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO₂ - NMC): A balance between energy density, power output, and safety.
  • Lithium Iron Phosphate (LiFePO₄ - LFP): Extremely safe with a long cycle life but lower energy density.
• Voltage: Typically 3.6V or 3.7V nominal, with a full charge voltage of 4.2V and a discharged state at 2.5V–3.0V.
• Capacity: Ranges from mAh to over mAh, depending on the chemistry and manufacturer.
• Discharge Rate (C-Rating): Some cells are designed for high-drain applications, offering continuous discharge rates (CDR) up to 30A or more.
• Cycle Life: Depending on the type, an battery can last between 300 to + charge cycles before noticeable degradation.

Protected vs. Unprotected Cells

• Protected Batteries: Equipped with a protection circuit that prevents overcharging, over-discharging, and short-circuiting. These are often slightly longer (~70mm).
• Unprotected Batteries: Do not have built-in safety mechanisms and are mainly used in battery packs with external Battery Management Systems (BMS).

Common Applications

batteries are widely used in:

• Consumer Electronics: Laptops, flashlights, vapes, and power banks.
• Electric Vehicles (EVs) & E-Bikes: Tesla and other manufacturers use them in battery packs.
• Power Tools: Drills, saws, and industrial equipment.
• Energy Storage Systems: Solar power banks and uninterruptible power supplies (UPS).

Physical Variations

Some batteries have additional features that affect their size and compatibility:

• Button Top vs. Flat Top: Button top batteries have an extended positive terminal, while flat tops are flush.
• Protected vs. Unprotected: Protected cells are longer due to built-in circuitry.

If using an battery in a specific device, always verify the required specifications with the manufacturer to ensure proper fit and performance.

JOINSUN are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

I just order these & plan on building a 10AH battery pack 36 volt, 10S 5P. The other 40 batteries, I'll be using will be the new sodium ion batteries with 36 volt 50A bms.

So far, these cells have certainly met my expectations. Well packaged in shipment, in perfect condition and once topped up had worked great through a couple of charge/discharge cycles. Time will tell how they hold up.

I put this battery to the test twice. It has internal low resistance of 12 ohms. As for capacity the new battery had more than rated of mha. My tests gave mah and mah. Top of the line battery for sure.

If you are looking for more details, kindly visit Cylindrical Lithium-ion Cell.