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121530 33mAh Custom Thin Lithium Battery
The 121530 3.8V 33mAh Thin Lithium Battery is designed for ultra-compact electronic devices that require thin structure, lightweight design, and stable voltage output. With a 3.8V high-voltage platform and 33mAh capacity, this battery is suitable for smart cards, electronic tags, smart labels, wearable sensors, medical patches, electronic badges, and other space-limited rechargeable devices.
As a professional lithium polymer battery manufacturer, LithoTop provides customized thin lithium battery solutions, including cell size customization, labels, packaging, and OEM/ODM battery pack assembly.
Additional information
| Product Type | Ultra thin lipo battery |
|---|---|
| Model number | 121530 |
| Voltage (Nominal) | 3.8V |
| Capacity (Nominal) | 33mAh |
| Dimensions | 1.2±0.2*15±0.5*30±0.5mm |
| Constant Discharge Current | Typically 0.5C-1C |
| Working Temperature | charge: 0-45℃; discharge: -20-60℃ |
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 121530 3.8V 33mAh thin lithium battery is engineered for products where battery thickness, footprint, and weight are critical design factors. Compared with standard 3.7V miniature lithium polymer batteries, the 3.8V high-voltage design helps improve usable energy within a very limited battery volume.
With 33mAh capacity, this battery is suitable for low-power electronics requiring rechargeable energy for standby operation, sensor activation, LED indication, short wireless communication, and compact electronic module support. Its thin pouch structure makes it easier to integrate into card-type products, wearable modules, smart labels, and lightweight electronic devices.
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.
- Thin Lithium Battery Structure
Designed for slim electronic devices where battery thickness and internal layout are highly limited. - 3.8V High-Voltage Platform
Provides higher energy density compared with standard 3.7V lithium polymer battery designs. - 33mAh Miniature Capacity
Suitable for low-power electronics, standby backup, short activation cycles, and compact rechargeable systems. - Compact 121530 Cell Design
Easy to integrate into smart cards, electronic tags, wearable modules, and thin electronic products. - Stable Voltage Output
Supports small chips, sensors, LED indicators, Bluetooth modules, and low-power control circuits. - Lightweight Lithium Polymer Cell
Helps reduce total product weight for wearable, portable, and card-type applications. - Strict Thickness and Quality Control
Each battery is checked for voltage, capacity, thickness, appearance, and consistency before shipment.
- Smart cards
- Electronic tags
- Smart labels
- Electronic badges
- RFID active tags
- Wearable sensors
- Medical sensor patches
- Miniature Bluetooth modules
- Thin IoT sensor devices
- Compact rechargeable electronics
1mm Thickness Flat Lipo Battery
| Model | Voltage(V) | Capacity | Cell size(T*W*L)mm |
|---|---|---|---|
| 042040 | 3.7 | 8 | 0.4*20*40 |
| 042255 | 3.7 | 24 | 0.4*22*55 |
| 062550 | 3.7 | 40 | 0.6*25*50 |
| 072738 | 3.8 | 38 | 0.7*27*38 |
| 084545 | 3.7 | 110 | 0.8*45*45 |
| 012323 | 3.7 | 30 | 1*23*23 |
| 013040 | 3.7 | 80 | 1*30*40 |
| 013050 | 3.7 | 100 | 1*30*50 |
| 014348 | 3.7 | 130 | 1*43*48 |
| 014460 | 3.7 | 180 | 1*44*60 |
| 015253 | 3.7 | 180 | 1*52*53 |
| 015362 | 3.7 | 250 | 1*53*62 |
| 123030 | 3.7 | 80 | 1.2*30*30 |
| 126070 | 3.7 | 300 | 1.2*60*70 |
| 132939 | 3.7 | 90 | 1.3*29*39 |
| 153040 | 3.7 | 110 | 1.5*30*40 |
| 155075 | 3.7 | 350 | 1.5*50*75 |
| 155776 | 3.7 | 480 | 1.5*57*76 |
| 163050 | 3.7 | 160 | 1.6*30*50 |
| 191622 | 3.7 | 35 | 1.9*16*22 |
*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 Luggage Tag Project from Italy
An Italian travel technology company was developing a rechargeable smart luggage tag for business travelers and airline baggage identification. The product needed to remain thin and lightweight while powering an electronic ID circuit, LED indicator, and short wireless activation function. The main challenge was that the battery had to fit inside a very slim tag housing without creating visible bulging.
The customer contacted LithoTop because they needed a miniature thin lithium battery that could support rechargeable use while keeping the final product elegant and easy to attach to luggage. LithoTop reviewed the internal layout, standby current, activation cycle, charging method, available battery cavity, and expected usage time.
After evaluation, LithoTop recommended the 121530 3.8V 33mAh Thin Lithium Battery. Our engineering team judged that the 33mAh capacity was suitable for the customer’s low-power usage pattern, while the 3.8V high-voltage platform helped improve usable energy within the small battery volume.
During sample development, LithoTop optimized the cable outlet direction, wire length, insulation method, and label position to match the customer’s assembly process. Sample testing included thickness verification, capacity testing, standby simulation, pulse activation testing, charging compatibility checking, and installation fit validation.
Before mass production preparation, both teams confirmed samples, battery thickness tolerance, cable direction, labeling details, packaging requirements, and inspection standards. The final battery solution helped the customer keep the smart luggage tag slim while achieving stable rechargeable performance. For the customer, this improved product appearance, reduced assembly pressure, and supported smoother market launch preparation.
02 – Thin Medical Reminder Patch Project from the United States
A US healthcare electronics company was developing a thin medical reminder patch used to support medication schedules and short-term patient monitoring. The product needed to power a small control circuit, vibration reminder, LED indicator, and occasional wireless data transfer. Because the patch was designed for daily wearing, the battery had to remain thin, light, and comfortable against the skin.
The customer approached LithoTop after testing several miniature batteries that were either too thick or difficult to integrate into the patch structure. They needed a battery manufacturer that could balance compact size, stable output, and reliable production repeatability.
LithoTop analyzed the patch’s standby current, vibration load, transmission current peak, target usage time, charging method, enclosure material, and battery placement. Based on this evaluation, LithoTop recommended the 121530 3.8V 33mAh thin lithium battery as a compact rechargeable power source.
During prototype development, LithoTop adjusted the battery insulation design, cable outlet direction, wire length. Sample batteries were tested through standby simulation, vibration pulse testing, voltage stability checking, charge-discharge cycling, storage testing, and installation fit verification.
Before production approval, the customer confirmed sample performance, battery thickness, cable durability, packaging method, and incoming inspection standard. The final battery solution helped the medical reminder patch maintain a thinner and more comfortable design. For the customer, this improved user comfort, reduced mechanical design conflict, and supported a more reliable wearable healthcare product.
Why Choose LithoTop for Ultra Thin Battery Solutions?
Factory Support
Thin lithium batteries require precise control over thickness, sealing reliability, voltage consistency, internal resistance, tab position, cable direction, and mechanical tolerance. For ultra-small electronic products, even a slight change in battery size, wire outlet, or protection circuit position may affect final assembly.
LithoTop supports customers from early sample evaluation to mass production with professional engineering support and strict quality inspection. Our team can help evaluate battery thickness, product structure, runtime target, charging method, working current, 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 Card
A smart card manufacturer required ultra-thin rechargeable battery to fit a standard card. LithoTop developed the custom LiPo battery with 1mm thickness, stable performance, long service life for secure authentication and payment applications.
Wearable Health Patch
A healthcare company needed a lightweight and flexible battery for a wearable health monitoring patch. LithoTop engineered an ultra-thin LiPo battery with high energy density and reliable performance for continuous biometric monitoring.
GPS Tracker
An IoT device manufacturer required a compact battery with long standby time for a mini GPS tracker. LithoTop provided a customized ultra-thin LiPo battery that maximized available space while delivering stable power for real-time tracking applications.
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.
No. This battery is mainly designed for low-power and space-limited devices. For products requiring high current output, LithoTop can recommend other high-rate LiPo battery models.
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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.
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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