Why Battery Swelling Happens in Wearable Devices?
I often meet teams after swelling complaints appear. The product looks finished, the launch is…
The 422424 3.85V 260mAh High Voltage Polymer Battery is a compact rechargeable lithium polymer battery designed for small electronic devices that require higher energy density, stable voltage output, and reliable runtime within limited internal space. With a 3.85V high-voltage platform and 260mAh capacity, this battery is suitable for smart wearables, Bluetooth devices, compact health sensors, IoT trackers, smart accessories, and portable consumer electronics.
As a professional lithium polymer battery manufacturer, LithoTop provides customized high voltage polymer 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 | 422424 |
| Voltage (Nominal) | 3.85V |
| Capacity (Nominal) | 260mAh |
| Dimensions | 4.2±0.2*24±0.5*24±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 422424 3.85V 260mAh high voltage polymer battery is engineered for compact products that need more usable energy than standard 3.7V lithium polymer batteries. The 3.85V high-voltage chemistry supports a higher charging platform, helping improve energy density and extend device operating time without significantly increasing battery size.
With 260mAh capacity, this battery provides a practical balance between compact structure, lightweight design, and reliable runtime. It is especially suitable for small smart devices that need stable power for Bluetooth communication, sensors, processors, display indicators, vibration motors, and standby operation.
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 battery performance, reliable safety, and consistent mass production quality.


| Model | Voltage(V) | Capacity(mAh) | Cell size(T*W*L)mm | Shape |
|---|---|---|---|---|
| 282223V4 | 3.85 | 160 | 2.8*22*23 | Pouch |
| 300976V4 | 3.85 | 205 | 3*9*76 | Pouch |
| 301522V4 | 3.85 | 120 | 3*15*22 | Pouch |
| 302223V4 | 3.85 | 160 | 3*22*23 | Pouch |
| 361322V4 | 3.85 | 120 | 3.6*13*22 | Pouch |
| 371723V4 | 3.85 | 180 | 3.7*17*23 | Pouch |
| 402228V4 | 3.85 | 360 | 4*22*28 | Pouch |
| 421724V4 | 3.85 | 220 | 4.2*17*24 | Pouch |
| 423030V4 | 3.85 | 470 | 4.2*30*30 | Pouch |
| 481923V4 | 3.85 | 240 | 4.8*19*23 | Pouch |
| 482030V4 | 3.85 | 400 | 4.8*20*30 | Pouch |
| 492026V4 | 3.85 | 340 | 4.9*20*26 | Pouch |
| 492930V4 | 3.85 | 730 | 4.9*29*30 | Pouch |
| 502329V4 | 3.85 | 430 | 5*23*29 | Pouch |
| 502828V4 | 3.85 | 580 | 5*28*28 | Pouch |
| 502833V4 | 3.85 | 750 | 5*28*33 | Pouch |
| 502930V4 | 3.85 | 700 | 5*29*30 | Pouch |
| 502933V4 | 3.85 | 780 | 5*29*33 | Pouch |
| 512930V4 | 3.85 | 710 | 5.1*29*30 | Pouch |
| 522732V4 | 3.85 | 720 | 5.2*27*32 | Pouch |
| 522830V4 | 3.85 | 705 | 5.2*28*30 | Pouch |
| 532626V4 | 3.85 | 480 | 5.3*26*26 | Pouch |
| 542141V4 | 3.85 | 700 | 5.4*21*41 | Pouch |
| 552224V4 | 3.85 | 410 | 5.5*22*24 | Pouch |
| 553535V4 | 3.85 | 1150 | 5.5*35*35 | Pouch |
| 562830V4 | 3.85 | 770 | 5.6*28*30 | Pouch |
| 562833V4 | 3.85 | 800 | 5.6*28*33 | Pouch |
| 562930V4 | 3.85 | 730 | 5.6*29*30 | Pouch |
| 571430V4 | 3.85 | 300 | 5.7*14*30 | Pouch |
| 592930V4 | 3.85 | 750 | 5.9*29*30 | Pouch |
| 601828V4 | 3.85 | 400 | 6*18*28 | Pouch |
| 602133V4 | 3.85 | 550 | 6*21*33 | Pouch |
| 602533V4 | 3.85 | 780 | 6*25*33 | Pouch |
| 602830V4 | 3.85 | 750 | 6*28*30 | Pouch |
| 602931V4 | 3.85 | 880 | 6*29*31 | Pouch |
| 603040V4 | 3.85 | 1200 | 6*30*40 | Pouch |
| 603228V4 | 3.85 | 800 | 6*32*28 | Pouch |
| 613228V4 | 3.85 | 850 | 6.1*32*28 | Pouch |
| 623030V4 | 3.85 | 750 | 6.2*30*30 | Pouch |
| 632730V4 | 3.85 | 800 | 6.3*27*30 | Pouch |
| 632833V4 | 3.85 | 800 | 6.3*28*33 | Pouch |
| 642425V4 | 3.85 | 500 | 6.4*24*25 | Pouch |
| 642931V4 | 3.85 | 900 | 6.4*29*31 | Pouch |
| 653228V4 | 3.85 | 850 | 6.5*32*28 | Pouch |
| 682528V4 | 3.85 | 650 | 6.8*25*28 | Pouch |
| 702229V4 | 3.85 | 630 | 7*22*29 | Pouch |
| 702343V4 | 3.85 | 900 | 7*23*43 | Pouch |
| 752435V4 | 3.85 | 900 | 7.5*24*35 | Pouch |
| 753228V4 | 3.85 | 1000 | 7.5*32*28 | Pouch |
| 802035V4 | 3.85 | 850 | 8*20*35 | Pouch |
| 853033V4 | 3.85 | 1150 | 8.5*30*33 | Pouch |
| 102530V4 | 3.85 | 1000 | 10*25*30 | Pouch |
| 103862V4 | 3.85 | 4000 | 10*38*62 | Pouch |
| 123039V4 | 3.85 | 2050 | 12*30*39 | Pouch |
| 123137V4 | 3.85 | 1900 | 12*31*37 | 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 Danish wearable electronics company was developing a compact wellness device for daily activity tracking and gentle vibration reminders. The product needed to support Bluetooth connection, motion sensing, LED indication, and standby operation while remaining lightweight and comfortable for users.
The customer contacted LithoTop because their previous standard 3.7V battery could fit the product structure, but the runtime was not strong enough during real usage simulation. Increasing battery size would have affected the product thickness and wearing comfort, so the customer needed a higher energy density solution.
LithoTop reviewed the wearable device layout, standby current, Bluetooth transmission peak, vibration motor load, charging circuit, cable routing, and target runtime. After evaluation, LithoTop recommended the 422424 3.85V 260mAh High Voltage Polymer Battery. Our engineering team judged that the 3.85V high-voltage platform could provide more usable energy within a compact battery size, while the 260mAh capacity matched the customer’s lightweight design goal.
During sample development, LithoTop optimized the connector type, wire length, PCM protection option, cable outlet direction, and battery label to match the customer’s assembly process. Sample testing included capacity verification, Bluetooth transmission simulation, vibration load testing, charging compatibility checking, temperature monitoring, and installation fit verification.
Before mass production, both teams confirmed samples, battery dimensions, connector specifications, charging requirements, labeling details, and batch inspection standards. The final battery solution helped the wearable product achieve more stable daily runtime without increasing product size. For the customer, this improved user comfort, reduced redesign pressure, and supported a smoother product launch.
A Canadian IoT company was developing a compact smart asset tracker for tools, luggage, and portable equipment. The device required stable power for Bluetooth communication, motion detection, buzzer alerts, and periodic status updates. Their previous small battery worked during standby testing, but voltage dropped quickly when the wireless module and alert function operated at the same time.
The customer approached LithoTop because they needed a custom battery manufacturer that could evaluate real operating conditions instead of only supplying a standard battery model. LithoTop analyzed the tracker’s standby current, wireless transmission interval, buzzer load, charging method, enclosure space, and expected daily usage cycle.
Based on the analysis, LithoTop recommended the 422424 3.85V 260mAh high voltage polymer battery. The 260mAh capacity helped keep the tracker small and lightweight, while the high-voltage chemistry provided better usable energy than a standard 3.7V battery of similar size.
During prototype development, LithoTop adjusted the PCM protection design, connector position, wire length, insulation method, and packaging requirement to match the customer’s assembly process. Sample batteries were tested through standby simulation, wireless pulse testing, buzzer load testing, voltage stability checking, charge-discharge cycling, storage testing, and installation fit evaluation.
Before mass production, the customer confirmed approved sample performance, connector durability, battery label, packaging method, and incoming inspection standard. LithoTop then controlled production according to the confirmed golden sample.
The final battery solution helped the smart tracker maintain stable operation during alerts and wireless updates. For the customer, this reduced unexpected shutdowns, improved field reliability, and made the product more competitive in the compact IoT tracking market.
High voltage polymer batteries require more than a higher nominal voltage. To achieve reliable performance, the battery must control material stability, voltage consistency, internal resistance, thickness tolerance, cycle performance, charging compatibility, and protection circuit design.
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.
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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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