From the super-fast cars that race across dirt tracks to the powerful aeroplanes soaring through the sky, RC vehicles have captivated enthusiasts for a long time. Many parts and details make every vehicle, but when it comes to performance, there is one crucial component—the battery. Choosing this part of your vehicle is essential for getting the most out of your experience.
It serves as the primary power source that moves your RC vehicle, providing the necessary energy to run motors and other electronic components. You can buy a battery for an RC vehicle to optimise the longevity and performance of your vehicle, whether you race, drift, or face challenging terrains. To help you narrow down your selection, here is what you need to consider.
Different Types of RC Batteries
NiMH (Nickel-Metal Hydride)
It’s a rechargeable battery that has a hydrogen-absorbing alloy as its main component. A NiMH battery is easy to maintain and it’s often the standard choice on entry-level RC vehicles, and is commonly used for cars, trucks and boats.
LiPo (Lithium-Polymer)
Thanks to its superior energy density, a LiPo battery can store more energy in a smaller, lighter design. It provides high discharge rates, leading to longer run times, but it requires careful handling and specific charging equipment. It’s most commonly seen in electric RC models.
Li-ion (Lithium-ion)
They’re similar to LiPo batteries, but they have a bit lower discharge rate, but their advantage is that they offer a longer lifespan.
NiCd (Nickel-Cadmium)
They were once the standard for RC vehicles. NiCd batteries offer durability and high-power outputs, but their downside is that they lose their maximum energy capacity if not discharged before recharging, which is not convenient for users.
There are other types of batteries used in the RC hobby industry besides these four, but two of them have proven to be most suited for RC vehicles—the NiMH and LiPo. Some RC cars come with NiMH batteries, but LiPo batteries are popular as well.
Important Features
Voltage
It is a measure of the battery’s electrical potential. A higher voltage battery can deliver more power, therefore, higher speed and enhanced performance for your RC vehicle. The battery you choose should match the voltage of your RC vehicle. Using a higher voltage battery can damage your electronics, while a lower voltage one can lead to poor performance.
Capacity
It’s measured in milliampere-hours (mAh). An important thing to note is that a higher capacity may provide longer run time, but the battery may be larger and heavier.
Discharge Rate
Also referred to as a C rating, it indicates how quickly a battery can discharge safely. A battery with a higher discharge rate can bring more power quickly. This can make a world of difference when it comes to high-performance RC models, as they need batteries with higher C ratings to provide the power needed.
Size and Weight
Pick the size of your battery carefully, as it needs to fit perfectly within the designated compartment of the vehicle. Consider the weight, too, as a heavier battery may affect the balance and handling of your RC vehicle.
Battery Connectors
Their role is to connect the battery and the motor and allow for efficient power transfer. Additionally, they can keep the battery safe from damage caused by excessive current draw or short circuits. The battery connectors you choose should match those on your RC vehicle and in case they don’t, you can use adapters for compatibility.
A Few Tips on How to Keep Your RC Battery in Good Shape for Longer
Most importantly, avoid over-charging. It is never a good idea, as it can damage the battery. To stay on the safe side, you can use an electronic speed controller (ESC) with a low-voltage cut-off to prevent over-charging. If you’re using a LiPo battery, don’t let the voltage drop below 3.0V per cell.
If you’re using a NiMH battery, fully discharging and recharging your battery can help maintain its performance, but if it’s a LiPo, be careful not to overdo it as it can damage the battery. Replace the battery if it shows any sign of damage, swelling, or reduced performance.
Remember to always use a charger that’s compatible with your battery type. LiPo batteries, for instance, require specific charging equipment. Charge your RC vehicle in a safe, hazard-free area and handle batteries with care. If you won’t use them for some time, make sure to store them at a partial charge (around 50-60%). Avoid storing your batteries in extreme temperatures, and in case of swollen or damaged batteries, safely dispose of them and make sure to stick to the local regulations.
Final Thoughts
When you choose a battery for an RC vehicle, opt for one that’s compatible with your model’s requirements and follow the manufacturer’s guidelines for charging, usage and storage. The right power source can unlock your vehicle’s potential and provide hours of thrilling adventures on the track. Even if you’re new to the hobby, using a beginner’s guide to buying your first RC vehicle, add an RC battery to your list.