Introduction
If you’re new to the world of RC cars, drones, or portable electronics, you’ve probably come across the term 2S lipo battery. But what does “2S” actually mean, and why would you choose it over other options?
At A&S Power, we manufacture custom lithium polymer batteries for OEM buyers worldwide. This guide covers everything you need to know about 2S lipo batteries – from voltage and capacity to common uses and charging tips.
For a complete overview of our custom battery capabilities, check out our full guide: [Custom Lithium Polymer Battery – OEM/ODM Solutions for IoT, Wearables & Medical Devices] .
For a complete voltage reference covering all LiPo configurations, see our [LiPo Battery Voltage Chart & C-Rating Guide].
If you’re new to lipo batteries, start with our [Lipo Battery 101] guide for the basics.
What is a 2S Lipo Battery?
A 2S lipo battery is a lithium polymer battery pack that contains two cells connected in series. The “S” stands for “series,” meaning the cells are stacked together to increase voltage.
Key specifications:
| Specification | Value |
|---|---|
| Number of cells | 2 cells (2S) |
| Nominal voltage | 7.4V (2 × 3.7V) |
| Full charge voltage | 8.4V (2 × 4.2V) |
| Cutoff voltage | 6.0V (2 × 3.0V) |
| Common capacities | 500mAh – 5,000mAh |
| Common configurations | 2S1P (2 cells in series, 1 in parallel) |
Common Uses of 2S Lipo Batteries
2S lipo batteries are widely used in applications requiring moderate power and compact size:
| Application | Why 2S Lipo Battery |
|---|---|
| Small RC cars and trucks | Balanced speed and runtime for entry-level models |
| Mini drones and quadcopters | Lightweight, compact power source |
| Airsoft guns | Reliable power for consistent firing |
| Portable electronics | Powers devices requiring 7.4V input |
| DIY projects | Ideal for custom robots and gadgets |
| RC boats | Lightweight power for small watercraft |
2S Lipo Battery vs 3S vs 4S – What’s the Difference?
| Feature | 2S Lipo (7.4V) | 3S Lipo (11.1V) | 4S Lipo (14.8V) |
|---|---|---|---|
| Voltage | 7.4V | 11.1V | 14.8V |
| Speed/Power | Moderate | Higher | Very high |
| Weight | Lightest | Medium | Heavier |
| Runtime | Longer | Medium | Shorter |
| Skill level | Beginner-friendly | Intermediate | Advanced |
| Best for | Entry-level RC, small drones | Mid-sized RC, drones | Racing, larger RC |
For more information on different cell counts, check out our guides on [3S Lipo Battery] , [4S Lipo Battery] , and [6S Lipo Battery] .
How to Choose the Right 2S Lipo Battery
1. Capacity (mAh)
Higher capacity = longer runtime. For small RC cars, 1,500-3,000mAh is common. For mini drones, 500-1,000mAh is typical.
2. Discharge rate (C-rating)
For casual RC cars, 20C-30C is sufficient. For racing or high-performance, 50C-70C is recommended.
3. Connector type
Most 2S lipo batteries come with XT60, Deans, JST, or EC2 connectors. Check your device compatibility.
4. Physical dimensions
Ensure the battery fits your battery compartment – especially important for compact devices.
How to Charge a 2S Lipo Battery Safely
What you need:
-
Lipo balance charger (supports 2S)
-
2S balance lead connection
-
Fire-safe charging bag
Step-by-step:
-
Connect the main power leads to the charger
-
Connect the balance lead to the charger’s balance port
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Set charger to 2S (7.4V) – do not select 3S or 4S
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Set charging current to 1C – e.g., 1A for a 1,000mAh battery
-
Start charging and monitor the process
-
Disconnect when the charger shows “Complete”
⚠️ Never charge a 2S lipo battery without balance charging – uneven cell charging creates fire hazards.
For detailed charging instructions, see our [How to Charge Lipo Batteries] guide.
Frequently Asked Questions
1. Can I use a 2S lipo battery in a 1S device?
No. 2S batteries deliver higher voltage (7.4V vs 3.7V) and will damage 1S-compatible devices.
2. What is the voltage of a fully charged 2S lipo battery?
A fully charged 2S lipo battery reads 8.4V (4.2V per cell).
3. What is the lowest voltage for a 2S lipo battery?
The minimum voltage is 6.0V (3.0V per cell). Discharging below this causes permanent capacity loss.
4. How long does a 2S lipo battery last?
Under normal use, a 2S lipo battery lasts 300-500 cycles (3-5 years).
5. Is a 2S lipo battery suitable for beginners?
Yes. 2S batteries are the most beginner-friendly option – lower power, lighter weight, and easier to handle than 3S or 4S batteries.
Custom Lipo Battery Solutions from A&S Power
At A&S Power, we manufacture custom lithium polymer batteries for OEM buyers across multiple industries. From RC cars and drones to medical devices and wearables, we deliver tailored solutions with safety and performance in mind.
✅ Custom dimensions and capacities
✅ OEM labeling and packaging
✅ UL, CE, RoHS, and UN38.3 certification
✅ Engineering support from concept to production
📄 Request a Technical Datasheet – Contact Us
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Dongguan A&S Power Technology Co., Limited.
Building 1, No. 2, Keji 9th Road, Songshan Lake, Dongguan, Guangdong, China
📞 +86 137 1383 1631 | ✉ info@enerbe.net