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What is a Round Lipo Battery?
A round LiPo battery is a circular, flexible-cell rechargeable battery engineered for applications where conventional rectangular cells won’t fit. It combines the best of LiPo technology—high energy density and light weight—with a adaptable form factor.
Key Advantages:
- Compact & Space-Efficient: The circular footprint enables optimal use of space in cylindrical device compartments.
- Design-Flexible: The pouch cell can be tailored in diameter and thickness to meet custom shape requirements.
- High Performance: Delivers the reliable power and rechargeability expected from advanced LiPo chemistry.
These properties make it an exceptional choice for powering wearable devices, medical implants, and other compact, custom-shaped electronics.
How Round LiPo Battery Cells Differ from Coin, Cylindrical, and Rectangular Cells
Round LiPo vs. Coin (Button) Cells
- Rechargeability: Most coin or button cells are primary (single-use) or have limited rechargeable options, whereas round LiPo batteries are fully rechargeable with a long cycle life.
- Energy Density: Round LiPo cells typically store more energy for their size and deliver higher discharge rates than typical coin cells.
- Flexibility: Round LiPo batteries are soft-pouch cells that can be customized in diameter and thickness, while coin cells are rigid and fixed in size.
Round LiPo vs. Cylindrical Lithium-Ion Cells
- Shape & Fit: Cylindrical cells (like 18650s) are hard-cased and have fixed diameters, making them less adaptable to slim or uniquely shaped devices. Round LiPo pouches, by contrast, can be tailored to precise dimensions.
- Weight: The pouch construction of a round LiPo is lighter because it eliminates the metal casing required for cylindrical cells.
- Design Freedom: Cylindrical cells require more structural support inside the device, while flat round batteries can fit seamlessly into curved or compact housings.
Round LiPo vs. Rectangular LiPo Packs
- Form Factor: Both are soft-pouch lithium polymer cells with similar chemistry, but rectangular packs are designed for flat spaces, whereas round LiPos fit circular or irregular cavities.
- Space Utilization: In a round enclosure, a circular cell makes more efficient use of available volume than a rectangular pack, reducing wasted space.
Round Lipo Battery Sizes
Round LiPo batteries are available in a wide range of standard diameters and thicknesses, and can also be custom-built to match your product’s exact specifications. Because these are pouch-type lithium polymer cells, manufacturers can adjust both diameter and thickness during production. This flexibility makes it possible to design a battery that precisely matches the internal cavity of medical devices, smart rings, hearing aids, fitness trackers, or any product with a circular housing.
LanDazzle Round Lipo Batteries Sizes:
Specifications
| Model | Capacity | Voltage | Energy Density | Cycle Life | Weight | Discharge Rate |
| BP606563 | 4000mAh | 3.87V | 778Wh/L | 500times | 47g | 1.2C |
| R45350 | 460mAh | 3.7V | 393Wh/L | 1000times | 8g | 1C |
How to Choose a Round Lipo Battery
Selecting the right round LiPo battery starts with understanding your device’s unique requirements. Below are key application scenarios and a simple four-step method to help you choose confidently.
Application Scenarios
- Wearable Devices (Smartwatches, Fitness Bands):
Prioritize small size with high capacity to maximize runtime while fitting within slim housings. - TWS Bluetooth Earbuds:
Focus on ultra-small diameter and thin profiles, such as cells around Φ14 mm × T4.5 mm, to fit compact charging cases and earbud stems. - Medical Equipment (Hearing Aids, Implantable Devices):
Emphasize safety, reliability, and certified materials, ensuring long cycle life and stable performance under strict regulatory standards. - IoT Devices & Miniature Robots:
Look for a balance of capacity, discharge rate, and lightweight construction to power sensors, wireless modules, and micro-actuators.
Four-Step Selection Method
Step 1 – Measure the Space
Determine the maximum allowable diameter and thickness of the battery compartment. Always leave a small clearance to accommodate tolerances and potential expansion.
Step 2 – Calculate Capacity
Estimate your device’s minimum required capacity (mAh) based on its average power consumption and desired operating time between charges.
Step 3 – Check the Discharge Rate
Identify the peak current draw of your device and ensure the battery’s continuous discharge rating can handle that load without overheating or voltage drop.
Step 4 – Define the Connection
Specify the wire type, length, and connector needed for easy integration into your circuit—whether it’s a standard JST plug or a custom harness.
LanDazzle Custom Round Lipo Battery
At LanDazzle, we specialize in designing and manufacturing custom round LiPo batteries that match your product’s exact size, capacity, and performance requirements. Whether you need a micro cell for a wearable device or a high-capacity pack for a medical or IoT application, our in-house engineering team can deliver a solution tailored to your specifications.
What We Offer
- Fully Custom Dimensions
- Flexible Capacity & Voltage
- Connector & Lead Options
- Certified Safety
Why Choose Lan Dazzle
- Precision Engineering: Our R&D team works closely with you to optimize shape, energy density, and discharge rate for your unique enclosure.
- Fast Prototyping: From concept to prototype samples, we provide quick turnaround to accelerate your product development.
- Reliable Manufacturing: ISO-certified facilities ensure consistent quality and long cycle life across every production batch.
Contact us today to get a free consulation.
Email: info@landazzle.com
Whatsapp: +8618938252128
Round Lipo Battery FAQs
Q1: Are round LiPo batteries safe to use?
Yes, round LiPo batteries are safe when used and charged according to the manufacturer’s instructions. Avoid puncturing, short-circuiting, or exposing the battery to extreme temperatures. Following proper handling guidelines ensures long life and safety.
Q2: How long do round LiPo batteries last?
With proper care—such as correct charging, avoiding over-discharge, and storing in appropriate conditions—round LiPo batteries can last over 1,000 charge cycles. Lifespan may vary depending on usage patterns and environmental factors.
Q3: Can round LiPo batteries be recharged?
Yes, round LiPo batteries are rechargeable. Always use a compatible charger that matches the battery’s voltage and capacity to ensure safety and longevity.
Q4: How should I store round LiPo batteries?
Store in a cool, dry place, away from flammable materials. For long-term storage, keep the battery at around 50% charge rather than fully charged or fully discharged.
Q5: What are the typical applications for round LiPo batteries?
Round LiPo batteries are ideal for wearables (smartwatches, fitness bands), TWS earbuds, medical devices, IoT sensors, and small robotics, where compact, lightweight, and high-energy-density power sources are needed.
Q6: Can round LiPo batteries operate in extreme conditions?
Standard LiPo cells perform best between 0°C and 45°C. For applications in colder or hotter environments, LanDazzle can provide custom low-temperature or high-temperature round LiPo solutions to ensure reliable performance.
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