Demystifying 2S LiPo Battery: Your Complete Guide

LiPo batteries are a favorite among hobbyists and professionals alike for their high energy density and lightweight design. Whether you’re into RC cars, drones, or other gadgets, you’ve likely encountered the term “2S LiPo battery.” But what does “2S” mean, and why is it important? In this comprehensive guide, we’ll explore everything you need to know about 2S LiPo batteries, from their basic characteristics to how to choose the best one for your needs.

Part 1. What does 2S mean on a LiPo battery?

 2s lipo battery pack 

The “2S” in a 2S LiPo battery stands for “2 Series.” This indicates that the battery consists of two individual cells connected in series. In a series connection, the voltages of each cell add up while the capacity (mAh) remains the same. Each LiPo cell typically provides a nominal voltage of 3.7 volts. Therefore, a 2S battery combines these cells to deliver a nominal voltage of 7.4 volts.

Why Series Connection?

Series connections are used to increase the voltage of the battery pack without changing the capacity. This higher voltage is essential for devices that require more power to operate efficiently. It’s a common configuration in many applications, from RC vehicles to drones and portable electronics.

Part 2. What is the voltage of a 2S LiPo battery?

A single LiPo cell has a nominal voltage of 3.7 volts. When two cells are connected in series, their voltages combine. Thus, a 2S LiPo battery has a nominal voltage of 7.4 volts (3.7V + 3.7V). However, when fully charged, each cell can reach up to 4.2 volts, making the total voltage of a fully charged 2S battery 8.4. Conversely, the voltage can drop to 6.0 volts (3.0V per cell) when fully discharged.

Voltage Range

Understanding the voltage range is crucial for the safe operation of your devices. Operating outside this range can damage the battery or the device. Most electronic speed controllers (ESCs) and chargers are designed to handle this specific voltage range.

Part 3. 2S LiPo battery capacity

The capacity of a 2S LiPo battery is measured in milliampere-hours (mAh). This indicates how much charge the battery can hold and how long it can power your device. For example, a 2S LiPo battery with a capacity of 2000mAh can provide 2000 milliamps of current for one hour. The higher the capacity, the longer the run time.

Choosing the Right Capacity

When selecting a battery, consider your device’s power requirements and the expected run time. Higher capacity batteries provide longer run times but are often heavier and larger. Balancing capacity with size and weight is key to optimizing performance.

Part 4. 2S LiPo battery key parameters

When shopping for a 2S LiPo battery, several key parameters can influence your decision:

  • Voltage (V): A 2S battery has a nominal voltage of 7.4V.
  • Capacity (mAh): Determines the battery’s run time.
  • C-Rating: Indicates the discharge rate. A higher C-rating means the battery can deliver more current, which is crucial for high-performance applications.
  • Size and Weight: Ensure the battery fits your device’s battery compartment.
  • Connector Type: Ensure the battery’s connector is compatible with your device.

Understanding C-Rating

The C-rating is a measure of how quickly the battery can be discharged. For instance, a 2000mAh battery with a 20C rating can safely discharge at 40,000mA (2000mAh x 20C). High C-ratings are essential for applications that require bursts of high power, like racing drones or high-speed RC cars.

Part 5. How to buy a good 2S LiPo battery?

2s lipo battery

Finding a high-quality 2S LiPo battery involves a bit of research and consideration. Here are some tips to guide you:

  1. Research Brands: Stick to well-known brands with a reputation for quality and reliability. Brands like Turnigy, Gens Ace, and Venom have established themselves in the RC community.
  2. Check Specifications: Ensure the battery’s specifications match your device’s requirements. Pay attention to voltage, capacity, and C-rating.
  3. Read Reviews: Look for feedback from other users who have used the battery in similar applications. Reviews can provide insights into the battery.
  4. Consider Warranty and Support: A good warranty and responsive customer support can save you a lot of trouble if you encounter any issues with your battery. Check the warranty terms and see what kind of customer support the manufacturer offers.
  5. Price vs. Performance: While going for the cheapest option is tempting, remember that you often get what you pay for. Investing more in a high-quality battery can provide better performance, longevity, and safety.
  6. Compatibility: Ensure the battery’s dimensions and connectors match your device’s specifications. Some batteries come with adapters, but it’s always best to double-check.
  7. Safety Features: Look for batteries with built-in safety features like overcharge protection, short circuit protection, and thermal cutoff. These features can prevent damage and prolong the battery’s life.

Part 6. Top 10 2S LiPo battery manufacturers

If you’re looking for reliable 2S LiPo batteries, consider these top manufacturers known for their quality and performance:

1. Ufine Battery

Ufine is a custom lithium battery manufacturer from China. Their product range includes lithium polymer batteries, 18650 batteries, LiFePo4 batteries, and lithium-ion battery packs. They are known for their consistent quality, long cycle life, and comprehensive safety features. The most important thing is that they can customize batteries of different sizes, capacities, and voltages according to customer needs. Contact us now to get a quote!

2. Turnigy:

Characteristics: Turnigy is a well-known brand for affordable, high-quality 2S LiPo batteries. They offer various capacities, discharge rates, and physical sizes to cater to various RC and hobby applications.

3. Tattu:

Characteristics: Tattu is known for its premium 2S LiPo batteries with high energy density, low internal resistance, and reliable performance. They prioritize safety and quality in their battery design.

4. Thunder Power

Characteristics: Thunder Power is a premium LiPo battery manufacturer focusing on high-performance, low-resistance cells. They are known for their attention to detail and advanced manufacturing processes.

5. Rhino

Characteristics: Rhino is a brand specializing in 2S LiPo batteries designed for heavy-duty applications. They offer rugged, high-discharge-rate batteries with excellent durability and safety features.

6. Multistar

Characteristics: Multistar is a brand owned by Hobbyking, known for its affordable and reliable 2S LiPo batteries. They provide a good balance of performance and value across various capacities and discharge rates.

7. Gens Ace

Characteristics: Gens Ace is a reputable manufacturer of high-quality 2S LiPo batteries. They are known for their exceptional performance, long cycle life, and comprehensive safety features.

8. Zippy

Characteristics: Zippy is a brand offering a wide range of 2S LiPo batteries, catering to budget-conscious and performance-oriented users. They provide a decent balance of price and quality.

9. Lectron Pro

Characteristics: Lectron Pro is a manufacturer known for its high-quality and high-performance 2S LiPo batteries. They focus on advanced cell chemistry, strict quality control, and innovative safety features.


Characteristics: MaxAmps specializes in high-capacity, high-discharge-rate 2S LiPo batteries. They are known for their exceptional power delivery and extended runtime.

These 10 manufacturers offer a wide range of 2S LiPo batteries with varying characteristics, catering to the diverse needs of hobbyists, professionals, and industrial users.

Part 7. Conclusion

Understanding the specifics of 2S LiPo batteries can significantly enhance your device experience. From knowing the voltage and capacity to considering key parameters and choosing the right manufacturer, each aspect is crucial in ensuring you get the best performance and longevity from your battery.



Electronic Engineering Writer

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