What is the voltage of a 4s battery?

Jul 10, 2025

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Emily Chen
Emily Chen
Emily is a senior R&D engineer at Shenzhen Greatech Energy Technology Co., Ltd. With over 10 years of experience in the lithium battery industry, she has made significant contributions to the company's battery cell research and development, focusing on enhancing battery performance and safety.

Hey there, folks! As a supplier of 4S batteries, I often get asked about the voltage of a 4S battery. So, I thought I'd sit down and write a blog post to clear up any confusion and give you all the lowdown on this topic.

First things first, let's talk about what "4S" actually means. In the world of batteries, the "S" stands for "series." When you have a battery pack with multiple cells connected in series, the voltage of the pack is the sum of the voltages of the individual cells.

Most lithium - polymer (LiPo) cells, which are commonly used in 4S battery packs, have a nominal voltage of about 3.7V. So, when you have a 4S battery pack, you're essentially connecting four of these cells in series. To calculate the nominal voltage of a 4S battery, you simply multiply the voltage of a single cell by the number of cells in the series. That is, 3.7V x 4 = 14.8V.

So, the nominal voltage of a 4S battery is 14.8V. But that's not the whole story. The voltage of a LiPo battery can vary depending on its state of charge. When a 4S battery is fully charged, each cell can reach a voltage of around 4.2V. So, for a fully - charged 4S battery, the voltage would be 4.2V x 4 = 16.8V. On the other hand, when the battery is completely discharged, each cell's voltage drops to about 3.0V. So, a fully - discharged 4S battery would have a voltage of 3.0V x 4 = 12.0V.

Why is this voltage range important? Well, it has a big impact on how you use and charge your 4S battery. For example, if you're using a 4S battery to power a drone, the performance of the drone can vary depending on the battery's voltage. When the battery is fully charged and at a higher voltage, the drone will have more power and can perform better, such as flying faster and climbing higher. As the battery discharges and the voltage drops, the drone's performance will gradually decline.

When it comes to charging a 4S battery, you need to be very careful. You should always use a charger that is specifically designed for 4S LiPo batteries. These chargers are programmed to charge each cell evenly and to stop charging when the battery reaches its maximum safe voltage (16.8V for a 4S battery). Overcharging a LiPo battery can be extremely dangerous. It can cause the battery to overheat, swell, and in some cases, even catch fire or explode.

Now, let's talk about the different capacities of 4S batteries that we offer. We have a range of 4S LiPo batteries with different amp - hour (mAh) ratings. For instance, we have the 14.8V 10000mAh Lipo Battery. This battery is a great choice for smaller drones or other devices that don't require a huge amount of power but still need a decent runtime. A higher mAh rating means the battery can store more energy and will generally provide a longer runtime.

If you need a battery with more power and longer runtime, we also offer the 14.8V 22000mAh Lipo Battery. This battery is suitable for larger drones or other high - power applications. It can deliver more energy over a longer period of time, allowing your device to operate for extended periods without needing to be recharged.

14.8V 10000mAh Lipo Battery (3)14.8V 10000mAh Lipo Battery (2)

Another option in our lineup is the 14.8V 16000mAh Lipo Battery. This battery offers a good balance between capacity and size. It's not as large as the 22000mAh battery but still provides a decent amount of power and runtime, making it a popular choice for many users.

As a supplier, we take pride in offering high - quality 4S batteries. Our batteries are made with top - notch materials and are rigorously tested to ensure they meet the highest standards of safety and performance. We understand that our customers rely on our batteries for a variety of applications, from drones to RC cars and other electronic devices. So, we do everything we can to make sure our batteries are reliable and long - lasting.

If you're in the market for a 4S battery, whether it's for your drone, RC vehicle, or any other device, we'd love to hear from you. We can help you choose the right battery based on your specific needs and requirements. Whether you need a battery with a higher capacity for longer runtime or a smaller, more lightweight battery for a portable device, we've got you covered.

Contact us today to start the procurement process. We're here to answer any questions you might have and to assist you in making the best decision for your battery needs. We look forward to working with you and providing you with the best 4S battery solutions.

References

  • Battery University: A great resource for all things related to battery technology and knowledge.
  • LiPo battery manufacturer specifications and guidelines.
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