Products

Small 401520 100mAh Li-polymer Battery

The 401520 3.7V 100mAh Li-polymer Battery is designed for small electronic devices that require lightweight structure, stable voltage output, and flexible battery integration. With a 3.7V nominal voltage and 100mAh capacity, this battery is suitable for Bluetooth devices, wearable sensors, smart pens, electronic tags, compact medical devices, smart accessories, and other miniature rechargeable electronics.

As a professional lithium polymer battery manufacturer, LithoTop provides customized 401520 Li-polymer battery solutions, including connector selection, wire length, PCM protection, NTC, cable direction, battery labels, shrink wrap, packaging, and OEM/ODM battery pack assembly.

Additional information

Product Type

Li-Polymer battery

Model number

401520

Voltage (Nominal)

3.7V

Capacity (Nominal)

100mAh

Dimensions

4.0±0.2*15±0.5*20±2.5mm

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.

401520 Battery Size

The 401520 3.7V 100mAh Li-polymer battery is designed for compact devices where internal space, battery weight, and stable rechargeable performance are important. Its small pouch cell structure makes it suitable for slim housings, wearable modules, wireless accessories, smart tags, and low-power portable electronics.

With 100mAh capacity, this battery can support low-power circuits such as Bluetooth modules, sensors, LED indicators, small control boards, memory chips, and standby systems. It is a practical choice for product developers who need a compact rechargeable battery with reliable output and flexible customization.

LithoTop applies strict production control during cell selection, capacity testing, voltage inspection, internal resistance testing, PCM assembly, aging verification, appearance inspection, and final quality control. These processes help ensure stable battery performance, reliable safety protection, and consistent mass production quality.

Lipo Series 2
  • 100mAh Compact Capacity
    Provides reliable rechargeable power for miniature electronic devices and low-power applications.
  • Stable 3.7V Li-polymer Platform
    Supports sensors, Bluetooth modules, LED indicators, control boards, and standby circuits.
  • PCM Protection Available
    Supports overcharge, over-discharge, over-current, and short-circuit protection for safer battery operation.
  • Low Self-Discharge Performance
    Suitable for devices requiring standby operation, periodic use, and stable storage performance.
  • Strict Quality Inspection
    Each battery is checked for voltage, capacity, internal resistance, appearance, and consistency before shipment.
  • Custom Battery Pack Assembly
    Supports customized wires, connectors, PCM, NTC, labels, shrink wrap, and packaging according to project needs.
Bluetooth Headset Main
  • Bluetooth accessories
  • Wearable sensor modules
  • Smart pens and stylus devices
  • Electronic tags
  • Smart remote controls
  • Compact medical electronics
  • Mini IoT sensor devices
  • LED indicator products
  • Rechargeable smart toys
  • Compact consumer electronics

4mm Thickness Flat Lipo Battery

ModelsVoltage(V)Capacity(mAh)Cell Dimensions(mm)Shape
4008103.7154.0*8*10mmRectangle
4008243.7554.0*8*24mmRectangle
4008283.7624.0*8*28mmRectangle
4008303.7804.0*8*30mmRectangle
4008353.71004.0*8*35mmRectangle
4009123.7304.0*9*12mmRectangle
4009203.7604.0*9*20mmRectangle
4009303.7904.0*9*30mmRectangle
4009403.71204.0*9*40mmRectangle
4010103.7254.0*10*10mmRectangle
4010123.7304.0*10*12mmRectangle
4010143.7354.0*10*14mmRectangle
4010153.7404.0*10*15mmRectangle
4010183.740-10C4.0*10*18mmRectangle
4010203.7554.0*10*20mmRectangle
4010203.750-5C4.0*10*20mmRectangle
4010253.7754.0*10*25mmRectangle
4010273.7804.0*10*27mmRectangle
4010303.7904.0*10*30mmRectangle
4010353.71104.0*10*35mmRectangle
4010503.71604.0*10*50mmRectangle
4011143.7354.0*11*14mmRectangle
4011293.71104.0*11*29mmRectangle
4012143.7454.0*12*14mmRectangle
4012203.7704.0*12*20mmRectangle
4012253.71004.0*12*25mmRectangle
4012283.71104.0*12*28mmRectangle
4012303.71204.0*12*30mmRectangle
4012353.71304.0*12*35mmRectangle
4013423.72004.0*13*42mmRectangle
4014153.7504.0*14*15mmRectangle
4014233.71004.0*14*23mmRectangle
4014253.71204.0*14*25mmRectangle
4014303.81804.0*14*30mmRectangle
4014343.71604.0*14*34mmRectangle
4014383.72004.0*14*38mmRectangle
4015153.7654.0*15*15mmRectangle
4015203.71004.0*15*20mmRectangle
4015223.71104.0*15*22mmRectangle
4015233.71204.0*15*23mmRectangle
4015253.71204.0*15*25mmRectangle
4015353.72004.0*15*35mmRectangle
4017263.71704.0*17*26mmRectangle
4017303.71804.0*17*30mmRectangle
4018353.72704.0*18*35mmRectangle
4020203.71204.0*20*20mmRectangle
4020253.71504.0*20*25mmRectangle
4020263.71904.0*20*26mmRectangle
4020303.72004.0*20*30mmRectangle
4020303.82804.0*20*30mmRectangle
4020353.72504.0*20*35mmRectangle
4020403.73204.0*20*40mmRectangle
4020503.74004.0*20*50mmRectangle
4021203.71604.0*21*20mmRectangle
4022473.74504.0*22*47mmRectangle
4023233.71504.0*23*23mmRectangle
4024243.72204.0*24*24mmRectangle
4024243.82604.0*24*24mmRectangle
4024263.72504.0*24*26mmRectangle
4025253.72504.0*25*25mmRectangle
4025303.73004.0*25*30mmRectangle
4025353.73204.0*25*35mmRectangle
4025403.74004.0*25*40mmRectangle
4025503.75004.0*25*50mmRectangle
40251003.710004.0*25*100mmRectangle
40251303.715004.0*25*130mmRectangle
4026263.83204.0*26*26mmRectangle
4027803.710004.0*27*80mmRectangle
4030303.73004.0*30*30mmRectangle
4030353.7300-15C4.0*30*35mmRectangle
4030353.74004.0*30*35mmRectangle
4030403.75004.0*30*40mmRectangle
4030483.76004.0*30*48mmRectangle
4034503.78004.0*34*50mmRectangle
4040503.78504.0*40*50mmRectangle
4040603.712004.0*40*60mmRectangle
4043553.79004.0*43*55mmRectangle
4115153.8754.1*15*15mmRectangle
4115303.71504.1*15*30mmRectangle
4122263.82604.1*22*26mmRectangle
4208113.7254.2*8*11mmRectangle
4208403.71104.2*8*40mmRectangle
4212333.71254.2*12*33mmRectangle
4213273.91904.2*13*27mmRectangle
4214273.71404.2*14*27mmRectangle
4215303.71504.2*15*30mmRectangle
4215353.72004.2*15*35mmRectangle
4218323.72204.2*18*32mmRectangle
4219203.71204.2*19*20mmRectangle
4220253.71804.2*20*25mmRectangle
4220283.72354.2*20*28mmRectangle
4221233.72004.2*21*23mmRectangle
4224243.82604.2*24*24mmRectangle
4225303.73004.2*25*30mmRectangle
4230343.74004.2*30*34mmRectangle
4230483.75204.2*30*48mmRectangle
4230603.78004.2*30*60mmRectangle
4232823.814504.2*32*82mmRectangle
4234503.78004.2*34*50mmRectangle
4312153.7454.3*12*15mmRectangle
4312193.7804.3*12*19mmRectangle
4317303.72004.3*17*30mmRectangle
4320233.71504.3*20*23mmRectangle
4325253.73204.3*25*25mmRectangle
4339503.710004.3*39*50mmRectangle
4342783.715004.3*42*78mmRectangle
4508203.7504.5*8*20mmRectangle
4508383.71154.5*8*38mmRectangle
4508403.71204.5*8*40mmRectangle
4508433.71254.5*8*43mmRectangle
4509123.7404.5*9*12mmRectangle
4510123.7404.5*10*12mmRectangle
4510143.7504.5*10*14mmRectangle
4510333.71354.5*10*33mmRectangle
4511163.7684.5*11*16mmRectangle
4512143.7504.5*12*14mmRectangle
4512193.7804.5*12*19mmRectangle
4512253.71004.5*12*25mmRectangle
4513603.73504.5*13*60mmRectangle
4514173.7754.5*14*17mmRectangle
4515353.72004.5*15*35mmRectangle
4516163.7954.5*16*16mmRectangle
4516683.75504.5*16*68mmRectangle
4517303.72004.5*17*30mmRectangle
4518193.71104.5*18*19mmRectangle
4518203.71404.5*18*20mmRectangle
4518253.72004.5*18*25mmRectangle
4518353.72804.5*18*35mmRectangle
4518603.75004.5*18*60mmRectangle
4519173.81454.5*19*17mmRectangle
4519403.84004.5*19*40mmRectangle
4520253.71504.5*20*25mmRectangle
4520303.72504.5*20*30mmRectangle
4520353.73004.5*20*35mmRectangle
4520673.77004.5*20*67mmRectangle
4525263.73004.5*25*26mmRectangle
4525303.73404.5*25*30mmRectangle
4525473.75504.5*25*47mmRectangle
4525503.75004.5*25*50mmRectangle
4526313.73404.5*26*31mmRectangle
4527283.84004.5*27*28mmRectangle
4530383.75004.5*30*38mmRectangle
4530403.75004.5*30*40mmRectangle
4530483.76504.5*30*48mmRectangle
4534503.710004.5*34*50mmRectangle
4535353.73504.5*35*35mmRectangle
4712153.5554.7*12*15mmRectangle
4730483.78004.7*30*48mmRectangle
4810143.7454.8*10*14mmRectangle
4810153.7504.8*10*15mmRectangle
4812203.7804.8*12*20mmRectangle
4814453.72504.8*14*45mmRectangle
4815303.71804.8*15*30mmRectangle
4817243.71704.8*17*24mmRectangle
4817263.72004.8*17*26mmRectangle
4817303.72304.8*17*30mmRectangle
4819233.71904.8*19*23mmRectangle
4825303.73004.8*25*30mmRectangle
4830703.710004.8*30*70mmRectangle
4840783.720504.8*40*78mmRectangle
4927283.73504.9*27*28mmRectangle

*Contact us for custom LiPo battery 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 – Spain Smart Stylus Project with RoHS Support

A Spanish education technology company was developing a rechargeable smart stylus for digital learning tablets. The product needed to power a small control board, pressure detection circuit, Bluetooth pairing function, LED indicator, and standby system. The customer’s early prototype used a larger battery, but it made the stylus body too thick and affected the writing experience.

The customer contacted LithoTop because they needed a compact 3.7V rechargeable Li-polymer battery with stable output, small size, customized wire assembly, and RoHS support for European sales. LithoTop reviewed the stylus diameter, internal PCB layout, standby current, Bluetooth activation cycle, charging method, LED load, and target usage time.

After evaluation, LithoTop recommended the 401520 3.7V 100mAh Li-polymer Battery. Our engineering team judged that the 100mAh capacity was suitable for the stylus operating profile, while the compact pouch cell structure helped keep the product slim and comfortable to hold.

During sample development, LithoTop customized the wire length, connector type, cable outlet direction, PCM protection, insulation layer, and label format according to the customer’s assembly process. Sample batteries were tested through writing simulation, Bluetooth pairing cycles, LED indication testing, standby evaluation, charging compatibility checking, and installation fit validation.

Because the product was planned for European distribution, LithoTop also supported RoHS documentation preparation for the battery project. Before mass production, both teams confirmed golden samples, battery dimensions, connector durability, label details, packaging requirements, RoHS support documents, and incoming inspection standards.

The final battery solution helped the customer keep the smart stylus slim while achieving stable rechargeable performance. For the customer, this improved writing comfort, reduced mechanical redesign pressure, and supported smoother RoHS preparation for European market entry.

02 – Canada Wireless Ski Helmet Sensor Project

A Canadian sports safety company was developing a compact wireless sensor module for ski helmets. The device needed to record motion data, detect impact events, activate an LED status indicator, and send short wireless updates to a mobile application. The battery had to fit into a narrow sensor enclosure without adding noticeable weight to the helmet.

The customer approached LithoTop after testing several small rechargeable batteries that were either too large for the enclosure or unstable during short wireless transmission events. They needed a miniature lithium polymer battery that could balance compact size, reliable output, and repeatable production quality.

LithoTop analyzed the sensor’s standby current, motion sampling cycle, wireless transmission peak, LED indication time, charging circuit, enclosure structure, cable outlet position, and expected usage pattern during winter sports activities. Based on this evaluation, LithoTop recommended the 401520 3.7V 100mAh Li-polymer battery as a compact rechargeable power source.

During prototype development, LithoTop optimized the PCM protection design, wire routing, connector position, insulation layer, and outer packaging method to improve assembly reliability. Sample batteries were tested through motion recording simulation, wireless pulse discharge testing, LED status testing, voltage stability checking, charge-discharge cycling, storage testing, and installation fit evaluation inside the helmet sensor housing.

Before pilot production, the customer confirmed approved sample performance, cable durability, battery dimensions, connector reliability, packaging method, and batch inspection requirements. LithoTop then controlled production according to the confirmed golden sample and quality standards.

The final battery solution helped the helmet sensor maintain stable operation while keeping the device compact and lightweight. For the customer, this improved product comfort, reduced battery-related shutdown risk, and supported stronger field testing with winter sports users.

Why Choose LithoTop for 401520 Li-polymer Battery Solutions?

Factory Support

A reliable 401520 Li-polymer battery requires more than a small cell size. Battery performance depends on capacity consistency, voltage stability, internal resistance control, PCM protection design, cable outlet direction, connector reliability, insulation method, and final aging inspection.

LithoTop supports customers from sample evaluation to mass production with professional engineering support, flexible customization, strict production inspection, and project-based compliance documentation support. Our team can help evaluate battery size, runtime target, charging method, operating current, protection circuit, connector type, NTC requirement, and real application conditions before confirming the final battery solution.

More Customer Cooperation Cases

Powering leading batteries across wearables, medical devices, IoT, and consumer electronics in 30+ countries.. 

Smart Fitness Tracker

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 Device

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 Device

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.

Yes. LithoTop can support project-based certification and documentation requirements such as KC, CE, RoHS, UN38.3, MSDS, and other battery-related documents according to customer market requirements.

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.

Global Certifications & Compliance Support

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.

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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