Why Battery Swelling Happens in Wearable Devices?
I often meet teams after swelling complaints appear. The product looks finished, the launch is…
The 155625 3.8V 14mAh Ring Battery is designed for smart rings and compact wearable electronic devices that require thin structure, lightweight design, stable voltage output, and high space utilization. With a 3.8V high-voltage platform and 14mAh capacity, this battery is suitable for smart rings, wearable controllers, electronic jewelry, biometric modules, compact sensors, smart accessories, and other miniature rechargeable electronics.
As a professional lithium polymer battery manufacturer, LithoTop provides customized ring battery solutions, including cell size customization, curved structure evaluation, labels, packaging, and OEM/ODM battery pack assembly.
| Product Type | Curved Lipo battery |
|---|---|
| Model number | 155625 |
| Voltage (Nominal) | 3.8V |
| Capacity (Nominal) | 14mAh |
| Dimensions | 1.5±0.2*5.6±0.2*25±0.2mm (R10.7) |
| Constant Discharge Current | Typically 0.2C-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 155625 3.8V 14mAh ring battery is engineered for miniature wearable products where internal space is extremely limited. Ring-type electronics often require a battery that can support compact circuit boards, sensors, Bluetooth communication, touch control, LED indication, vibration feedback, and standby operation within a very small enclosure.
With 14mAh capacity, this battery is mainly suitable for low-power electronic devices requiring rechargeable power for short activation cycles, standby mode, periodic wireless communication, sensor detection, and lightweight wearable functions. The 3.8V high-voltage platform helps improve usable energy within a very limited battery volume.
LithoTop applies strict production control during cell selection, capacity testing, voltage inspection, internal resistance testing, thickness checking, aging verification, appearance inspection, and final quality control. These processes help ensure stable battery performance, reliable safety, and consistent mass production quality.


| Model | Voltage(V) | Capacity(mAh) | Cell Size(T*W*L)mm | Shape | Polairty&Direction |
|---|---|---|---|---|---|
| 125034 | 3.7 | 14 | 1.25*5.1*34 | Curve | CD |
| 3.8 | 16 | Curve | |||
| 125625Small 155625 3.8V 14mAh Ring Battery | 3.7 | 10 | 1.25*5.6*25 | Curve | CD |
| 3.8 | 12 | Curve | |||
| 125628 | 3.7 | 12 | 1.25*5.6*28 | Curve | CD |
| 3.8 | 14 | Curve | |||
| 125634 | 3.7 | 15 | 1.25*5.6*34 | Curve | CD |
| 3.8 | 17 | Curve | |||
| 126825126825 3.8V 15mAh Curved LiPo Battery | 3.7 | 13 | 1.25*6.9*25 | Curve | ABCD |
| 3.8 | 15 | Curve | |||
| 120732 | 3.7 | 17 | 1.25*7.1*31 | Curve | ABCD |
| 3.8 | 19 | Curve | |||
| 155028CE 155028 14mAh Wearable Battery | 3.7 | 12 | 1.52*5.1*28 | Curve | CD |
| 3.8 | 14 | ||||
| 155034 | 3.7 | 16 | 1.52*5.1*34 | Curve | CD |
| 3.8 | 18 | Curve | |||
| 155625 | 3.7 | 12 | 1.52*5.6*25 | Curve | CD |
| 3.8 | 14 | Curve | |||
| 155628 | 3.7 | 14 | 1.52*5.6*28 | Curve | CD |
| 3.8 | 16 | Curve | |||
| 155634 | 3.7 | 18 | 1.52*5.6*34 | Curve | CD |
| 3.8 | 20 | Curve | |||
| 156825156825 3.8V 18mAh Smart Ring Battery | 3.7 | 16 | 1.52*6.9*25 | Curve | ABCD |
| 3.8 | 18 | Curve | |||
| 150720 | 3.7 | 12 | 1.52*6.8*20.5 | Curve | ABCD |
| 3.8 | 13 | Curve | |||
| 150732 | 3.7 | 20 | 1.52*7.1*31 | Curve | ABCD |
| 3.8 | 22 | Curve | |||
| 160620160620 3.8V 12mAh Curved Polymer Battery | 3.7 | 11 | 1.6*6*20 | Curve | ABCD |
| 3.8 | 12 | Curve | |||
| 160625160625 3.8V 17mAh Curved Lithium Battery | 3.7 | 15 | 1.6*6*25 | Curve | ABCD |
| 3.8 | 17 | Curve | |||
| 160630160630 3.8V 18mAh Curved Batteries | 3.7 | 18 | 1.6*6*30 | Curve | ABCD |
| 3.8 | 21 | Curve | |||
| 160635 | 3.7 | 25 | 1.6*6*35 | Curve | D |
| 3.8 | 28 | Curve | |||
| 185625 | 3.7 | 17 | 1.8*5.6*25 | Curve | CD |
| 3.8 | 20 | Curve | |||
| 185628 | 3.7 | 19 | 1.8*5.6*28 | Curve | CD |
| 3.8 | 22 | Curve | |||
| 185634 | 3.7 | 23 | 1.8*5.6*34 | Curve | CD |
| 3.8 | 26 | Curve | |||
| 186825 | 3.7 | 22 | 1.8*7*25 | Curve | CD |
| 3.8 | 24 | Curve | |||
| 180732 | 3.7 | 30 | 1.8*7*31 | Curve | CD |
| 3.8 | 34 | Curve | |||
| 210630 | 3.7 | 30 | 2.1*6*30 | Curve | D |
| 3.8 | 33 | Curve | |||
| 210635 | 3.7 | 35 | 2.1*6*35 | Curve | C |
| 3.8 | 38 | Curve |
*Contact us for custom LiPo battery or customize your special battery !
Discover how we helps global customers solve real-world battery challenges through customized lithium battery solutions.
A German professional audio-visual equipment company was developing a compact presentation control ring for conference speakers, trainers, and exhibition presenters. The ring needed to power a touch-control circuit, Bluetooth module, LED indicator, and small vibration feedback function. The customer wanted the device to feel lighter and more natural than a handheld clicker, but the available battery space inside the ring housing was extremely limited.
The customer contacted LithoTop because their first prototype used a battery that was too large for the final industrial design. It caused assembly pressure near the PCB area and made the ring body thicker than expected. The customer needed a miniature rechargeable battery that could support short Bluetooth commands and feedback pulses while keeping the product slim.
LithoTop reviewed the ring’s internal layout, PCB position, touch-control current, Bluetooth transmission peak, vibration pulse duration, charging method, and target standby time. After evaluation, LithoTop recommended the 155625 3.8V 14mAh Ring Battery. Our engineering team judged that the 14mAh capacity was suitable for the customer’s low-power command-based usage, while the 3.8V high-voltage platform helped provide improved usable energy in the limited battery volume.
During sample development, LithoTop optimized tab position, insulation layer to reduce assembly pressure inside the ring shell. Sample batteries were tested through Bluetooth command simulation, touch activation testing, vibration pulse testing, standby evaluation, charging compatibility checking, and installation fit validation.
Before pilot production, both teams confirmed samples, battery dimensions, charging requirements, label format, packaging method, and incoming inspection standards. The final battery solution helped the customer keep the presentation ring compact, lightweight, and comfortable for long event use. For the customer, this reduced mechanical redesign work and supported a smoother product launch for professional AV users.
A Canadian industrial safety company was developing a discreet wearable alert ring for lone workers in warehouses, laboratories, and maintenance facilities. The ring was designed to send a short emergency signal when the user pressed a hidden button. It needed to power a low-power MCU, tactile switch circuit, LED confirmation indicator, and short wireless transmission function while remaining small enough for daily wearing.
The customer approached LithoTop after testing several miniature batteries that could fit the ring body but did not maintain stable voltage during repeated emergency signal simulations. The customer also needed a battery supplier that could provide consistent small-cell production quality, because even minor size differences could affect ring assembly.
LithoTop analyzed the alert ring’s standby current, button activation current, wireless transmission peak, LED confirmation time, charging circuit, waterproof sealing structure, and available battery cavity. Based on this analysis, LithoTop recommended the 155625 3.8V 14mAh ring battery as a compact rechargeable power source for the project.
During prototype development, LithoTop adjusted the insulation design, and battery packaging method to match the customer’s sealed ring structure. Sample batteries were tested through emergency activation simulation, wireless pulse testing, LED confirmation testing, voltage stability checking, charge-discharge cycling, storage testing, and installation fit verification.
Before production approval, the customer confirmed approved sample performance, battery thickness, packaging method, and batch inspection standard. LithoTop then controlled production according to the confirmed golden sample and quality requirements.
The final battery solution helped the alert ring maintain stable emergency signal output while keeping the product lightweight and discreet. For the customer, this improved user confidence, reduced battery-related validation risk, and supported a stronger field trial with industrial safety teams.
Ring batteries require more than small capacity and compact size. Because the product space is extremely limited, battery development must consider thickness, shape matching, sealing reliability, tab position, voltage consistency, internal resistance, charging compatibility, and mechanical stress during assembly.
LithoTop supports customers from early sample evaluation to mass production with professional engineering support and strict quality inspection. Our team can help evaluate ring structure, battery cavity, charging method, standby current, sensor load before confirming the 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.
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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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.
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