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755040 1500mAh high capacity round battery
The 755040 3.7V 1500mAh U-shape lithium polymer battery is a customized rechargeable LiPo pouch cell designed for smart wearable devices, medical electronics, industrial equipment, and compact IoT products. With its special U-shaped structure, high energy capacity, and stable discharge performance, this battery is ideal for devices requiring non-standard internal layouts and efficient space utilization.
Manufactured by Lithotop, this U-shape LiPo battery supports customized PCM/BMS solutions, connector configurations, and OEM/ODM battery assembly services for complex product structures.
Additional information
| Product Type | U shape Li-Polymer battery |
|---|---|
| Model number | 755040 |
| Voltage (Nominal) | 3.7V |
| Capacity (Nominal) | 1500mAh |
| Dimensions | 7.5*50*42mm |
| Constant Discharge Current | Typically 0.5C-1C |
| Working Temperature | charge: 0-45℃; discharge: -20-60℃ |
| Certification | ROHS |
Professional Grade A Lipo Battery Solutions
Delivering superior performance consistency and longer cycle life through automated cell matching technology designed for heavy-duty industrial applications.
The 755040 3.7V 1500mAh U-shape lithium polymer battery is designed to meet the needs of devices with irregular or split internal structures where standard rectangular or round batteries cannot fit efficiently. The U-shape design allows better space utilization in compact housings while maintaining stable energy output.
Produced using high-quality lithium polymer materials and advanced manufacturing processes, this battery delivers stable voltage output, low internal resistance, and reliable cycle life. It can also be customized with PCM protection boards, connectors, cables, and packaging according to customer project requirements.
- Special U-Shape Design
Optimized for devices with irregular or split internal space structures. - 1500mAh High Capacity
Provides long operating time for portable and smart electronic devices. - Flexible Structural Integration
Enables better space utilization in compact product designs. - Stable Charging & Discharging Performance
Ensures consistent voltage output and reliable operation. - Rechargeable & Long Cycle Life
Supports repeated charging cycles with stable performance retention. - Customizable Battery Solution
Supports PCM/BMS, connectors, wires, and labeling customization. - Low Internal Resistance
Improves energy efficiency and reduces heat generation.
- Smart wearable devices
- Portable medical equipment
- Industrial handheld terminals
- GPS tracking systems
- Wireless communication devices
- Smart IoT products
- Inspection and testing instruments
- Portable monitoring devices
- Special-shaped electronic devices
- Custom compact electronics
Round Shape Lipo Battery
| Model | Voltage(V) | Capacity(mAh) | Cell Dimension(T*D)mm | Shape |
|---|---|---|---|---|
| 253027 | 3.7 | 150 | 2.5*30 | Round |
| 253027 | 3.8 | 155 | 2.5*30 | Round |
| 303027 | 3.7 | 180 | 3*30 | Round |
| 303028 | 3.8 | 185 | 3*30 | Round |
| 303535 | 3.8 | 305 | 3*35 | Round |
| 353027 Custom 353027 Mini Round LiPo Battery | 3.7 | 220 | 3.5*30 | Round |
| 353535 | 3.7 | 365 | 3.5*35 | Round |
| 363027 | 3.8 | 235 | 3.6*30 | Round |
| 403535 | 3.8 | 425 | 4*35 | Round |
| 473027 Round lipo battery shape 473027 335mAh | 3.8 | 335 | 4.7*30 | Round |
| 493027 493027 300mAh round lipo battery | 3.7 | 300 | 4.9*30 | Round |
| 503535 RoHS Compliant 503535 525mAh LiPo Battery | 3.7 | 525 | 5*35 | Round |
| 553535 553535 580mAh IEC62133 Round battery | 3.7 | 580 | 5.5*35 | Round |
| 603535 603535 665mAh Round Lithium Battery Factory | 3.7 | 665 | 6*35 | Round |
| 604543 Flat 604543 1050mAh round lithium battery | 3.7 | 1050 | 6*45 | Round |
| 753535 | 3.85 | 845 | 7.5*35 | Round |
| 755040 755040 1500mAh high capacity round battery | 3.7 | 1500 | 7.5*50*40 | Round |
*Contact us for more Li-Po batteries or customize your special battery!
Customer Development Story
Discover how we helps global customers solve real-world battery challenges through customized lithium battery solutions.
01 – Smart Medical Device Project from UK
A UK medical device company was developing a portable diagnostic instrument with a highly constrained internal layout. During prototype testing, they found that standard straight battery packs could not fit the U-shaped internal cavity design, resulting in wasted space and unstable internal assembly.
The customer contacted Lithotop looking for a structural battery solution rather than only capacity improvement. After analyzing the device housing and circuit layout, Lithotop engineers recommended the 755040 3.7V 1500mAh U-shape LiPo battery to match the internal architecture.
Lithotop optimized the project by adjusting:
- U-shape segment balancing to ensure uniform discharge
- Custom PCM placement to fit curved structure
- Reinforced wire routing to prevent stress at bending points
During sample testing, the customer conducted vibration testing, continuous discharge testing, and assembly fitting tests. The U-shape structure significantly improved internal space utilization and mechanical stability.
Before mass production, both teams confirmed samples, structural fitting validation, PCM parameters, and long-cycle aging tests. The final product successfully achieved stable integration and improved device reliability in real clinical use.
02 – Industrial Inspection Device Project from USA
A US industrial technology company was developing a rugged inspection device used in complex field environments. Their previous battery design caused uneven internal pressure distribution and reduced mechanical stability during long-term vibration exposure.
The customer approached Lithotop seeking a structurally adaptive battery solution. After reviewing the application environment and internal layout constraints, Lithotop recommended the 755040 3.7V 1500mAh U-shape LiPo battery with reinforced internal structure and optimized PCM design.
During development, Lithotop improved internal current balance and reinforced bending area protection to ensure durability under repeated mechanical stress.
Sample testing included vibration testing, drop testing, thermal stability testing, and continuous operation evaluation. The U-shape battery significantly improved device robustness and internal structural reliability.
Before mass production, both teams confirmed assembly standards, connector consistency, aging performance, and packaging reliability. The final product achieved improved field durability and reduced failure rates in industrial deployment.
More Customer Cooperation Cases
Powering leading batteries across wearables, medical devices, IoT, and consumer electronics in 30+ countries..
Smart Bands
A European wearable technology company was developing a new smart fitness band with strict requirements for battery thickness, cycle life, and safety. Their device needed a lightweight LiPo battery that could fit into a compact wristband while support monitoring and Bluetooth connectivity.
Portable Medical Monitor
A startup company focusing on smart health products needed a flexible battery solution for their next-generation fitness monitoring wearable. The device design was slim and curved, requiring a customized LiPo battery with precise dimensions and stable charging performance.
Portable Translator
A customer from Asia was developing a portable AI translation device for travel and business communication. The product required a battery with stable voltage output, compact size, and long standby performance to support voice processing and wireless transmission.
Handling Precautions & Guidelines
Find answers to the most common questions about ordering, shipping, certifications, and working with lithotop as your battery partner.
Engineer’s will make inner BOM according to your confirmed samples. And our quality control teams continuously monitor the entire manufacturing process to ensure the each mass production is the same as samples.
LithoTop specializes in custom lithium battery solutions, including LiPo batteries, Li-ion battery packs, LiFePO4 batteries, high-rate drone batteries, curved batteries, ultra-thin batteries, and custom rechargeable battery packs for industrial and consumer applications.
LithoTop focuses on:Custom battery solutions for special applications, own developed PCB/PCM to help you with Competitive factory-direct pricing, Experience with difficult battery projects such as curved, ultra-thin, and high-discharge batteries. Long-term cooperation support for startups and established brands.
Yes. LithoTop provides fully customized battery solutions based on your device requirements, including voltage, capacity, discharge rate, dimensions, connector type, PCM/BMS protection, and special shapes such as curved or ultra-thin batteries.
Standard samples are usually available quickly about 3-7 days, while custom battery projects typically require evaluation, engineering confirmation, prototyping, and testing. The timeline depends on battery specifications, and certification requirements. Mass order is about 30 working days.
Depending on the product and project requirements, LithoTop batteries can support certifications including UN38.3, MSDS, CE, RoHS, IEC62133, UL , and other transportation or safety compliance documents.
MOQ depends on the battery model and customization level. Standard batteries may support lower quantities like 100pcs, while fully customized battery projects usually require a development MOQ. LithoTop supports both prototype projects and mass production orders.
LithoTop follows strict quality control procedures including:Incoming material inspection, Cell matching and grading Capacity, and voltage testing, Aging and performance tests, 100% Safety inspections before shipment.Quality consistency is critical for battery reliability and long-term cooperation.
Normally, we ship our batteries via DHL, UPS, FedEx, air freight, or sea , depending on order size, destination, and customer preference.
LithoTop is a professional lithium battery manufacturer with production experience in custom battery development and assembly. We provide direct factory support, engineering assistance, quality control, and customized battery solutions for global customers. We wecome you to visit our factory.
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Our Factory Insight
LithoTop operates advanced lithium battery manufacturing facilities equipped with automated production lines, precision testing equipment, and strict quality control systems. From cell selection to battery assembly and final inspection, every process is carefully managed to ensure stable performance, reliable quality, and high production efficiency. With experienced engineers and strong OEM/ODM capability, we provide customized battery solutions for customers worldwide.
Industry News Insight
Stay updated with the latest lithium battery industry news, product innovations, technology insights, and application trends from LithoTop. Explore expert articles, battery guides, and industry updates to learn more about custom lithium battery solutions, energy storage, UAV batteries, wearable device batteries, and advanced power technologies.
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