4/3 A 3.7 Volt Lithium Ion 18500 Battery (1600 mAh)

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Lithium Ion
3.7 Volt
Flat Top
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Product Specifications


  • Nominal Voltage: 3.7V
  • Size: 18500 (Cylindrical)
  • Capacity: 1600 mAh
  • Chemistry: Lithium Ion (Rechargeable Li-Ion)
  • Max Charging current: 1.6A
  • Max Discharging current: 2.6A
  • Terminal: Flat on Both Ends
  • Brand: Blue Sleeve
  • Dimensions:
  • Length: 50.3 mm
  • Diameter: 18.3 mm
  • Weight: 34 g (1.2 Oz)


  • No memory effect
  • Long storage life
  • Light weight and high energy density
  • 18500 cell is a little shorter than the 18650 cell

Ideal for the following applications:

  • High capacity packs for RC aircraft, RC cars, or camera batteries
  • Note: Li-Ion Batteries may explode if you do not charge or discharge them properly. Users must have knowledge on how to charge and discharge Li-Ion batteries before making Li-Ion Battery Packs. We are NOT responsible for any damage that is caused by the misuse of Li-Ion Batteries.

4/3 A 3.7 Volt Lithium Ion 18500 Battery (1600 mAh)

Lithium-ion batteries have become an essential power source for many devices that we use every day, from smartphones and laptops to electric vehicles and even airplanes. They are preferred over other types of rechargeable batteries because they offer high energy density, long cycle life, and low self-discharge rates. One of the most popular types of lithium-ion batteries is the 18500 battery, which is commonly used in RC aircraft, RC cars, and camera batteries.

The 18500 battery, also known as the 4/3 A battery, has a nominal voltage of 3.7 volts and a capacity of 1600 mAh. It is a cylindrical battery with a diameter of 18.3mm and a length of 50.3mm. This makes it slightly shorter than the more common 18650 battery, which has a diameter of 18.6mm and a length of 65mm. Despite its smaller size, the 18500 battery is capable of delivering high amounts of power, making it ideal for applications that require a lot of energy in a small form factor.

One of the benefits of the 18500 battery is its high energy density. This means that it can store a lot of energy in a relatively small package, making it ideal for portable devices like cameras, drones, and flashlights. It also has a long cycle life, which means that it can be recharged and discharged many times before it needs to be replaced. In fact, the 18500 battery can be cycled up to 500 times, which makes it a cost-effective solution for applications that require frequent use.

The 18500 battery is also lightweight, which makes it ideal for applications that require a small and portable power source. It has a high energy density of 94.5 Wh/kg, which means that it can deliver a lot of power for its size and weight. This makes it perfect for devices that need to be carried around, like portable radios or drones.

It is important to note that lithium-ion batteries can be dangerous if not handled properly. Li-ion batteries have been known to catch fire or explode if they are not charged or discharged correctly. As a result, it is essential to follow the manufacturer's instructions when using these batteries. Users must have knowledge on how to charge and discharge Li-Ion batteries before making Li-Ion Battery Packs. It is crucial to avoid overcharging or overdischarging the battery, as this can lead to thermal runaway and cause the battery to catch fire or explode.

To prevent accidents, it is important to buy high-quality batteries from reputable manufacturers. The 18500 battery from Blue Sleeve is a reliable and safe option. It has a protective circuit to prevent overcharging and overdischarging, which helps to prevent thermal runaway. It also has a long storage life, which means that it can be stored for long periods without losing its charge. This makes it ideal for emergency power supplies or backup power.

In conclusion, the 18500 battery is a powerful and reliable power source for many portable devices. Its high energy density, long cycle life, and lightweight make it ideal for applications that require a lot of power in a small package. However, users must follow proper charging and discharging procedures to avoid accidents. Buying high-quality batteries from reputable manufacturers like Blue Sleeve can help to ensure the safety and reliability of the battery. The 18500 battery is an excellent choice for anyone looking for a small and powerful battery that can be used in a variety of applications.