Remote-controlled (RC) cars are a popular hobby for enthusiasts of all ages. A critical component of any RC car is its battery, which determines the car's performance, runtime, and overall user experience. One type of battery that has gained attention in recent years is the 18650 lithium-ion battery. Keep reading to know more about 18650 batteries.

 

What Are 18650 Batteries?

 

The 18650 battery is a type of rechargeable lithium-ion battery. The name "18650" refers to its dimensions: 18mm in diameter and 65mm in length, with a cylindrical shape. Initially, they were popularised by laptop manufacturers due to their durability and high energy density but ultimately found their way into various other applications such as flashlights, vapes, power tools, and even electric vehicles.

 

Benefits of 18650 Batteries

 

18650 batteries offer several advantages:

High Capacity: These batteries typically have a capacity ranging from 1200mAh to 3600mAh, and when combined into packs, they can exceed 5000mAh.

Long Service Life: They can be recharged up to 500 times or more, making them a cost-effective option in the long run.

High Voltage: The standard voltage for 18650 batteries is 3.6V to 3.7V, and they can reach up to 4.2V when fully charged. This is significantly higher than the 1.2V typically seen in nickel-cadmium or nickel-metal hydride batteries.

No Memory Effect: Unlike some other types of batteries, 18650 batteries do not suffer from the memory effect, meaning they do not need to be fully discharged before recharging.

 

Can You Use 18650 Batteries for RC Cars?

 

So, can you use the 18650 batteries for RC cars? The short answer is yes. But as with everything in life, it comes with its own set of pros and cons. As aforementioned, 18650 batteries have a high energy density, which means they can provide extraordinary run times, a feat highly sought after in the world of RC cars. The rechargeability ensures longevity, and the low self-discharge rate means that even if the RC car is shelved for a while, it would not completely drain out, thereby augmenting its readiness.

However, transitioning to 18650 batteries for RC cars isn’t without its considerations. For starters, 18650 batteries work at a higher voltage (3.7V) than regular NiMH or NiCd batteries (1.2V) often provided with RC cars. Therefore, it’s imperative to check if your RC car can handle such a high voltage before you switch; otherwise, it may damage the RC car’s electronic components.

Another consideration is the actual physical size and weight of the 18650 battery. While it carries substantial power, it's larger and heavier than typical AA batteries, so it might not fit all RC cars or could potentially weigh the vehicle down. Therefore, the size of the battery compartment in the RC car and how much additional weight it can handle must be assessed.

Lastly, but most importantly, the task of charging these batteries must be handled with meticulous care. 18650 batteries can be risky if charged improperly or if a malfunctioning charger is used; this could even lead to destructive events such as a fire. Therefore, only a good quality, dedicated lithium-ion charger should be used, and batteries should never be left unsupervised while charging.

 

Using Considerations

 

When using 18650 batteries for RC cars, consider the following:

Battery Configuration

Series vs. Parallel: Connecting batteries in series increases the voltage while connecting them in parallel increases the capacity. Ensure the configuration matches the requirements of your RC car.

Balance Charging: Use a balance charger to ensure each cell in the battery pack is charged equally. This prevents overcharging and extends the lifespan of the batteries.

Monitoring and Maintenance

Regular Inspection: Check the batteries regularly for any signs of damage, swelling, or leakage. Damaged batteries should be disposed of properly.

Temperature Monitoring: Keep an eye on the temperature of the batteries during use and charging. Overheating can lead to failure or even fires.

Storage and Handling

Safe Storage: Store the batteries in a cool, dry place away from flammable materials. Use a fireproof container if possible.

Proper Handling: Avoid dropping or puncturing the batteries. Handle them with care to prevent any physical damage.

 

In conclusion, using 18650 batteries for RC cars can indeed be an excellent option, given that they provide increased energy and reduced charging costs. However, certain important factors such as voltage compatibility, physical size, weight, and charging process should be thoroughly considered and addressed before proceeding. Once these are managed efficiently, an RC car powered by a set of 18650 batteries could undoubtedly heighten your driving experience.