Why Battery Swelling Happens in Wearable Devices?
I often meet teams after swelling complaints appear. The product looks finished, the launch is…
The 601015 3.8V 75mAh High Voltage LiPo Battery is designed for miniature electronic devices that require higher energy density, stable voltage output, and lightweight battery structure. With a 3.8V high-voltage platform and 75mAh capacity, this battery is suitable for smart rings, Bluetooth accessories, wearable sensors, medical patches, smart pens, electronic tags, and other compact rechargeable devices.
As a professional lithium polymer battery manufacturer, LithoTop provides customized 601015 high voltage LiPo battery solutions, including connector selection, wire length, PCM protection, NTC, cable direction, labels, shrink wrap, packaging, and OEM/ODM battery pack assembly.
| Product Type | High Voltage Lipo Battery |
|---|---|
| Model number | 601015 |
| Voltage (Nominal) | 3.8V |
| Capacity (Nominal) | 75mAh |
| Dimensions | 6.0±0.2*10±0.5*15±2.5mm |
| Constant Discharge Current | Typically 0.5C-1C |
| Working Temperature | charge: 0-45℃; discharge: -20-60℃ |
Delivering superior performance consistency and longer cycle life through automated cell matching technology designed for heavy-duty industrial applications.

The 601015 3.8V 75mAh high voltage LiPo battery is engineered for small devices where every millimeter of internal space matters. Compared with standard 3.7V LiPo batteries, the 3.8V high-voltage design helps provide more usable energy within a very compact battery size.
With its small 601015 pouch cell structure, this battery is ideal for products that need a slim and lightweight power source while maintaining reliable runtime. The 75mAh capacity supports low-power electronics, short wireless communication, sensor operation, standby mode, and compact wearable functions.
LithoTop applies strict production control during cell selection, capacity testing, voltage inspection, internal resistance testing, aging verification, appearance checking, and final quality inspection. These processes help ensure stable performance, reliable safety, and consistent mass production quality.


| Model | Voltage(V) | Capacity(mAh) | Size(T*W*L)mm | Shape |
|---|---|---|---|---|
| 07350V3 | 3.8 | 150 | 7*35 | Cylindrical |
| 302535V3 | 3.8 | 310 | 3*25*35 | Pouch |
| 321255V3 | 3.8 | 220 | 3.2*12*55 | Pouch |
| 332226V3 | 3.8 | 220 | 3.3*22*26 | Pouch |
| 351423V3 | 3.8 | 115 | 3.5*14*23 | Pouch |
| 352028V3 | 3.8 | 220 | 3.5*20*28 | Pouch |
| 381140V3 | 3.8 | 200 | 3.8*11*40 | Pouch |
| 401026V3 | 3.8 | 95 | 4*10*26 | Pouch |
| 402546V3 | 3.8 | 640 | 4*25*46 | Pouch |
| 412527V3 | 3.8 | 320 | 4.1*25*27 | Pouch |
| 421355V3 | 3.8 | 300 | 4.2*13*55 | Pouch |
| 431268V3 | 3.8 | 430 | 4.3*12*68 | Pouch |
| 444271V3 | 3.8 | 2100 | 4.4*42*71 | Pouch |
| 450930V3 | 3.8 | 130 | 4.5*9*30 | Pouch |
| 452328V3 | 3.8 | 330 | 4.5*23*28 | Pouch |
| 462028V3 | 3.8 | 280 | 4.6*20*28 | Pouch |
| 462427V3 | 3.8 | 370 | 4.6*24*27 | Pouch |
| 462428V3 | 3.8 | 400 | 4.6*24*28 | Pouch |
| 502023V3 | 3.8 | 230 | 5*20*23 | Pouch |
| 502530V3 | 3.8 | 450 | 5*25*30 | Pouch |
| 534562V3 | 3.8 | 2350 | 5.3*45*62 | Pouch |
| 582926V3 | 3.8 | 620 | 5.8*29*26 | Pouch |
| 582938V3 | 3.8 | 850 | 5.8*29*38 | Pouch |
| 592830V3 | 3.8 | 750 | 5.9*29*30 | Pouch |
| 601015V3 | 3.8 | 75 | 6*10*15 | Pouch |
| 602227V3 | 3.8 | 380 | 6*22*27 | Pouch |
| 602830V3 | 3.8 | 680 | 6*28*30 | Pouch |
| 603030V3 | 3.8 | 750 | 6*30*30 | Pouch |
| 604048V3 | 3.8 | 1650 | 6*40*48 | Pouch |
| 604347V3 | 3.8 | 1700 | 6*43*47 | Pouch |
| 605050V3 | 3.8 | 2100 | 6*50*50 | Pouch |
| 652831V3 | 3.8 | 800 | 6.5*28*31 | Pouch |
| 654552V3 | 3.8 | 2000 | 6.5*45*52 | Pouch |
| 693572V3 | 3.8 | 2700 | 6.9*35*72 | Pouch |
| 702025V3 | 3.8 | 400 | 7*20*25 | Pouch |
| 704347V3 | 3.8 | 2000 | 7*43*47 | Pouch |
| 755275V3 | 3.8 | 4500 | 7.5*52*75 | Pouch |
| 803763V3 | 3.8 | 2960 | 8*37*63 | Pouch |
| 902523V3 | 3.8 | 500 | 9*25*23 | Pouch |
| 902554V3 | 3.8 | 1600 | 9*25*54 | Pouch |
| 902624V3 | 3.8 | 620 | 9*26*24 | Pouch |
| 902628V3 | 3.8 | 850 | 9*26*28 | Pouch |
| 104357V3 | 3.8 | 3500 | 10*43*57 | Pouch |
| 123258V3 | 3.8 | 2800 | 12*32*58 | Pouch |
*Contact us for more Li-Po batteries or customize your special battery!
Discover how we helps global customers solve real-world battery challenges through customized lithium battery solutions.
A Finnish wearable technology company was developing a smart ring prototype for health tracking and daily activity monitoring. The product needed to collect sensor data, support Bluetooth communication, and remain comfortable for all-day wearing. The main challenge was the extremely limited battery space inside the ring structure.
The customer contacted LithoTop because standard small LiPo batteries could not meet both the size and runtime requirements. LithoTop reviewed the smart ring’s internal layout, sensor working current, Bluetooth transmission interval, charging circuit, battery compartment tolerance, and expected standby time.
After evaluation, LithoTop recommended the 601015 3.8V 75mAh High Voltage LiPo Battery. Our engineering team judged that a 3.8V high-voltage platform could help increase usable energy within a very small battery size, while the 75mAh capacity was suitable for low-power sensor and Bluetooth operation.
During sample development, LithoTop optimized the cable outlet direction, wire length, PCM protection option, and battery label to match the customer’s compact assembly process. Sample batteries were tested through capacity verification, Bluetooth pulse testing, standby simulation, charging compatibility checking, and installation fit validation.
Before mass production preparation, both teams confirmed samples, battery dimensions, cable direction, charging requirements, labeling details, and inspection standards. The final battery solution helped the customer improve smart ring runtime without increasing the product size. For the customer, this reduced redesign pressure and supported faster prototype validation.
A US medical electronics company was developing a lightweight wearable sensor patch for short-term health monitoring. The patch needed to power a sensor module, data processing circuit, and wireless communication function while staying thin and comfortable on the skin. Their previous battery solution was too large and made the patch less flexible.
The customer approached LithoTop because they needed a small rechargeable battery that could provide stable voltage output in a compact structure. LithoTop analyzed the patch’s working current, wireless transmission peak, charging method, enclosure design, safety protection requirement, and target wearing time.
Based on the analysis, LithoTop recommended the 601015 3.8V 75mAh high voltage LiPo battery. The compact pouch cell structure helped fit the thin patch design, while the high-voltage chemistry supported better energy density for limited-space medical wearable applications.
During prototype development, LithoTop adjusted the PCM protection design, wire length, insulation method, and packaging requirement to match the customer’s assembly process. Sample testing included sensor operation simulation, wireless transmission pulse testing, voltage stability checking, charge-discharge cycling, storage testing, and installation fit evaluation.
Before production approval, the customer confirmed the sample performance, battery thickness, connector durability, packaging method, and incoming inspection standard. LithoTop then prepared production control according to the approved golden sample.
The final battery solution helped the medical sensor patch maintain stable power output while keeping the product lightweight and comfortable. For the customer, this improved user experience, reduced mechanical design conflict, and supported a more reliable wearable medical product.
Miniature high voltage LiPo batteries require precise control over battery thickness, voltage consistency, internal resistance, capacity stability, charging compatibility, and protection circuit design. For small smart devices, even a slight change in battery size, cable direction, or connector position may affect final product assembly.
LithoTop supports customers from sample development to mass production with professional engineering support and strict quality inspection. Our team can help evaluate battery size, runtime target, charging voltage, working current, connector type, PCM design, NTC requirement, and real application conditions before confirming the final battery solution.
Powering leading batteries across wearables, medical devices, IoT, and consumer electronics in 30+ countries..



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.
Yes. High voltage LiPo batteries usually require a compatible high-voltage charging circuit, such as a 4.35V/4.4V charging platform. The charging design should be confirmed before sample testing and mass production.
Explore more customized lithium battery solutions from LithoTop








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.
LithoTop provides comprehensive certification support for custom lithium batteries to help customers accelerate product development and global market entry. From prototype verification to mass production, our engineering team assists with battery compliance, transportation documentation, and international safety standards, reducing certification risks and shortening your project timeline.
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.
I often meet teams after swelling complaints appear. The product looks finished, the launch is…
Confusion costs time, money, and reliability. I see teams argue labels. They miss the real…
You ask for a price quote. The supplier sends a number. You compare three quotes…
Get Your Factory-Direct Quote
LithoTop | Battery Expert
Online
Hi! Welcome to LithoTop.
Please send your specs for an instant solution:
1. Dimensions (T*W*L)
2. Voltage & Capacity
3. Peak Current
I'm online to help you now!
— Caroline | LithoTop
WhatsApp Us
Online | Privacy policy
WhatsApp us
Response within 12 hours. Save up to 30% on bulk orders.
🔒 100% Privacy. No Hidden Costs. Free Sample Options.