3.7V 50mAh LiPo Battery (AS401119): Certifications, UN38.3 & Safety Documents
Published by A&S Power | Battery Certification & Compliance
Introduction
When you source a 3.7V 50mAh LiPo battery for a wearable, IoT sensor, or compact medical device, the electrical specs are only half the story. The other half is documentation: safety certifications, transportation test reports, material safety data sheets, and packaging validation. Without these documents, your battery cannot ship by air, cannot pass regulatory review, and cannot be integrated into a certified end product.
This article uses our AS401119 3.7V 50mAh lithium polymer battery as a real-world case study. We break down every certificate and test report that backs this tiny 1.8g cell—from UL 1642 safety certification to UN38.3 transportation testing, MSDS, 3-meter stacking tests, and 1.2-meter drop tests. If you are evaluating small LiPo batteries for your product, this is exactly the documentation package you should demand from your supplier.
The AS401119 is available for OEM/ODM orders on our product page. For a broader look at compact battery options, see our small LiPo battery complete guide.
AS401119 Product Overview
AS401119-3.7V-50mAh-Spec-Sheet
AS401119-Air-Transport-Report
AS401119-Sea-Transport-Report
AS401119-UN38.3-Test-Summary
AS401119-UN38.3-Test-Report
AS401119-MSDS
AS401119-3M-Stacking-Test-Report
AS401119-1.2M-Drop-Test-Report
The AS401119 is an ultra-compact lithium polymer battery designed for space-constrained applications. Here are the key specifications from the official product specification (Version 1.2):
| Parameter | Specification |
|---|---|
| Model | AS-401119-0050-112 (cell: 401119) |
| Chemistry | Lithium Polymer (LiCoO2 cathode) |
| Nominal Voltage | 3.7V |
| Rated Capacity | 50mAh (minimum 50mAh at 0.2C discharge) |
| Energy | 0.185Wh |
| Cell Dimensions | 3.8mm (T) × 11.5mm (W) × 19.5mm (L) max. |
| Pack Dimensions | 4.0mm (T) × 11.8mm (W) × 22.0mm (L) max. |
| Weight | Approx. 1.8g (cell: 1.4g) |
| Charge Voltage / Cut-off | 4.2V / 3.0V |
| Max Charge / Discharge Current | 50mA (1C) / 50mA |
| Internal Resistance | ≤480mΩ |
| Cycle Life | ≥80% capacity after 300 cycles; ≥65% after 500 cycles |
| Energy Density | 230 Wh/L |
| Operating Temperature | Charge: +10°C to +45°C; Discharge: +10°C to +50°C |
| Warranty | 1 year from shipment date |
At just 1.8g and 4mm thick, this is one of our smallest rechargeable LiPo cells—ideal for hearing aids, wearable sensors, smart rings, Bluetooth trackers, and compact medical devices. For other ultra-compact form factors, explore our AS401230 3.7V 120mAh cell in the same 4mm thickness family.
Safety Certifications
The AS401119 carries the following safety and compliance certifications, as stated in the official product specification (Section 13):
| Certification | What It Covers | Status for AS401119 |
|---|---|---|
| UL 1642 | Safety standard for individual lithium cells—electrical, mechanical, and fire hazard testing (overcharge, short circuit, crush, nail penetration, thermal abuse). | Completed. UL File # MH 60807. |
| IEC 62133 | International safety standard for portable lithium cells and batteries. Basis for CB Scheme multi-market certification. | Completed. |
| CE | Conformité Européenne marking required for products sold in the European Union. | Completed. 2013/56/EU passed. |
| RoHS | Restriction of Hazardous Substances—limits lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and 4 phthalates. | Pass. |
| REACH | EU Registration, Evaluation, Authorization and Restriction of Chemicals. SVHC declaration above 0.1%. | Pass. |
| Halogen Free | No halogens (chlorine, bromine) above threshold limits in materials. | Pass. |
UL 1642 is the most critical safety certification for lithium cells sold into the US market—without it, your product cannot pass FDA review for medical devices or UL certification for consumer electronics. For a detailed breakdown of all lithium battery safety standards, read our lithium battery safety and compliance guide.
UN38.3 Transportation Testing
UN38.3 is mandatory for any lithium battery shipped by air or sea. The AS401119 completed the full UN38.3 test program (Revision 8) at Dongguan ZRLK Testing Technology Co., Ltd., with report number DSP26080635-2, issued on August 27, 2026. All 8 test items passed.
The test used 48 samples total: 18 battery packs (B01–B18) at full charge (1 cycle and 25 cycles), and 30 cells (C01–C30) at 50% charge and full discharge states. Here is what each test involves and the AS401119 results:
| Test | What It Simulates | AS401119 Result |
|---|---|---|
| T.1 Altitude Simulation | Low-pressure environment at 15,000m (11.6 kPa) for 6 hours—simulates cargo hold during air transport. | Pass. 0% mass loss, ≥99.9% residual voltage. No leakage, venting, or fire. |
| T.2 Thermal Test | 7 cycles between +75°C and -40°C, 6 hours each—simulates extreme temperature swings during transport. | Pass. ≤0.08% mass loss, ≥98.8% residual voltage. No leakage or fire. |
| T.3 Vibration | Sinusoidal vibration 7–200Hz, 3 axes—simulates vehicle and aircraft vibration during shipping. | Pass. ≤0.03% mass loss, ≥99.8% residual voltage. No damage. |
| T.4 Shock | Half-sine shock 150g, 6ms, 3 axes—simulates impact during handling and transport. | Pass. ≤0.01% mass loss, ≥99.9% residual voltage. No damage. |
| T.5 External Short Circuit | Short terminals with ≤0.1Ω conductor at 55°C—worst-case short circuit scenario. | Pass. Max surface temperature 58.8°C. No fire, no explosion, no rupture. |
| T.6 Impact / Crush | Crush between flat plates—simulates physical damage to the cell. | Pass. Max surface temperature 25.9°C. No fire, no disassembly. |
| T.7 Overcharge | Charge at 2x rated current or higher to verify protection circuit activates. | Pass. No fire, no disassembly on all 8 samples. |
| T.8 Forced Discharge | Force discharge in reverse polarity at 1x rated current—simulates reverse installation. | Pass. No fire, no disassembly on all 20 samples. |
The UN38.3 test summary (report DSP26080635-3) is the document you provide to airlines and freight forwarders. Without a valid UN38.3 summary, lithium batteries are refused at the airport. We include this summary with every shipment.
MSDS Overview
The Material Safety Data Sheet (MSDS) for the AS401119 (report DSP26080635-1, issued August 27, 2026) follows ISO 11014:2009 and GB/T 16483-2008 standards, and references IATA DGR 67th edition and IMDG 42-24 for transport classification.
Key composition data (from Section 3 of the MSDS):
| Component | CAS Number | Concentration |
|---|---|---|
| Lithium Cobalt Oxide (LiCoO2) | 12190-79-3 | 35.5% |
| Graphite (C) | 7782-42-5 | 18% |
| Copper Foil (Cu) | 7440-50-8 | 15% |
| Aluminum Foil (Al) | 7429-90-5 | 9% |
| Nickel (Ni) | 7440-02-0 | 2.2% |
| Lithium Hexafluorophosphate (LiPF6) | 21324-40-3 | 2.8% |
| Ethylene Carbonate / DMC / EMC (electrolyte solvents) | 96-49-1 / 616-38-6 / 623-53-0 | 5% each |
Transport classification (from Section 14):
- Air (IATA DGR 67th): Packing Instruction PI965 Section IB (batteries alone), PI966 Section II (packed with equipment), PI967 Section II (contained in equipment). UN number UN3480 / UN3481. Hazard Class 9. State of charge must not exceed 30%.
- Sea (IMDG 2024): Not restricted under IMDG Code per Special Provision 188 (cell energy ≤0.185Wh falls below the threshold).
- Rail (RID 2025) / Road (ADR 2025): Can be shipped per relevant European dangerous goods agreements.
The MSDS also covers first-aid measures, fire-fighting procedures, accidental release handling, storage conditions, and disposal guidance. We provide the full MSDS PDF with every order and upon request for regulatory submissions.
Shipping & Packaging Validation Tests
Beyond UN38.3 cell-level testing, the AS401119 shipping packaging has been independently validated for transport durability. Both tests were conducted by ZRLK in August 2026.
3-Meter Stacking Test (Report DSP26080635-5)
This test verifies that the outer carton can withstand the weight of other packages stacked on top during warehouse and transport storage.
| Parameter | Value |
|---|---|
| Packaging | 5-layer corrugated carton, 280 × 260 × 250mm |
| Contents per carton | 3,850 cells. Net weight 5.39kg, gross weight 6.6kg |
| Stacking load | 72.60 kgf (calculated per UN packaging test 6.1.5, 3m height) |
| Duration | 24 hours |
| Result | Pass. No cell leakage, no carton deformation, no instability. |
1.2-Meter Drop Test (Report DSP26080635-4)
This test simulates accidental drops during handling. The package is dropped from 1.2 meters onto a rigid surface in three orientations: face, edge, and corner.
| Parameter | Value |
|---|---|
| Drop height | 1.2 meters |
| Orientations tested | Face, edge, corner (per UN Special Provision 188) |
| Package gross weight | 6.6kg |
| Result | Pass. Carton not cracked, contents not damaged, no cell-to-cell contact, no leakage. |
These packaging tests matter because even a cell that passes UN38.3 can be damaged in transit if the outer packaging fails. We validate both the cell and the shipping carton. For OEM-specific packaging and branding options, see our custom battery packaging solutions.
Protection Circuit Module (PCM)
The AS401119 pack includes a dedicated protection circuit module with premium Japanese components. This is what prevents the cell from entering unsafe conditions during charging and discharging:
| Component | Part Number | Manufacturer |
|---|---|---|
| Protection IC | S-8261-G3J | Seiko Instruments |
| MOSFET (charge/discharge control) | 8205A | — |
| NTC Thermistor (temperature monitoring) | NCP18XH103J03RB (10kΩ) | Murata |
PCM protection parameters:
- Over-charge protection voltage: 4.28 ± 0.025V
- Over-discharge protection voltage: 3.00 ± 0.005V
- Over-current protection: 1.00–1.50A
- Normal operation current consumption: ≤7μA (minimal standby drain for long shelf life)
The Seiko S-8261 series is a widely trusted protection IC in the medical and wearable battery industry, known for tight voltage tolerance and low power consumption. The Murata NTC thermistor enables the host device to monitor battery temperature and shut down charging if overheating occurs.
Why Full Certification Matters for OEM Buyers
When you source a tiny LiPo battery from an uncertified supplier, you inherit three risks that can kill your product launch:
- Shipping rejection. Airlines require a valid UN38.3 test summary before accepting lithium battery cargo. No UN38.3 = your goods stay at the origin airport. The AS401119 has UN38.3 (DSP26080635-2) plus the required test summary (DSP26080635-3), MSDS (DSP26080635-1), and packaging tests (DSP26080635-4/5).
- Regulatory delay. If your end product requires UL, FDA, CE, or KC certification, the battery inside must have its own cell-level certifications (UL 1642, IEC 62133). A consumer-grade cell without UL 1642 will stall your device certification by months. The AS401119 holds UL 1642 (File # MH 60807) and IEC 62133.
- Field failure and liability. Cells without proper protection circuits and safety testing can swell, leak, or catch fire under abuse conditions. The AS401119 uses a Seiko-based PCM with over-charge, over-discharge, over-current, and temperature protection, and has passed short-circuit, crush, overcharge, and forced discharge tests with zero fire or explosion.
For medical device OEMs, the documentation bar is even higher—see our custom medical batteries page for ISO 13485-aligned quality and traceability requirements.
Frequently Asked Questions
1. Is the AS401119 UN38.3 certified?
Yes. The AS401119 passed all 8 UN38.3 tests (Revision 8) at ZRLK laboratory. Report number DSP26080635-2, issued August 27, 2026. The UN38.3 test summary (DSP26080635-3) is available for shipping documentation.
2. Does the AS401119 have UL 1642 certification?
Yes. The cell is UL 1642 certified under UL File # MH 60807. UL 1642 is the required cell safety standard for lithium batteries used in products sold in the United States, including medical devices and consumer electronics.
3. What is the maximum state of charge for shipping?
Per IATA DGR and the MSDS, lithium-ion cells must be shipped at a state of charge (SoC) not exceeding 30% of rated capacity. For PI967 (battery contained in equipment), the device must indicate battery capacity not exceeding 25%. We ship all AS401119 cells at the required SoC level.
4. Can the AS401119 be shipped by sea without restrictions?
Yes. Under IMDG Code 2024 (Amdt 42-24), Special Provision 188 exempts cells with energy ≤0.185Wh from full dangerous goods regulation. The AS401119 is rated at 0.185Wh, so it qualifies for this exemption. However, proper packaging and documentation are still required.
5. What protection features does the PCM include?
The PCM uses a Seiko S-8261-G3J protection IC with an 8205A MOSFET and a Murata 10kΩ NTC thermistor. It provides over-charge protection at 4.28±0.025V, over-discharge protection at 3.00±0.005V, over-current protection at 1.00–1.50A, and temperature monitoring. Normal operation current consumption is ≤7μA.
6. How many cells fit in one shipping carton?
The validated shipping carton (280 × 260 × 250mm, 5-layer corrugated) holds 3,850 cells. Net battery weight is 5.39kg and gross package weight is 6.6kg. The carton has passed both 3-meter stacking (72.60kgf for 24h) and 1.2-meter drop tests.
7. Can I get the full certificate package for my regulatory submission?
Yes. We provide the full documentation package with every order, including: UL 1642 certificate, IEC 62133 report, UN38.3 test report and summary, MSDS, RoHS/REACH declarations, packaging test reports (stacking and drop), and the product specification. Contact us to request these documents for your specific project.
8. Is the AS401119 suitable for medical devices?
The AS401119 carries UL 1642, IEC 62133, CE, RoHS, REACH, and Halogen Free certifications, and uses a Seiko-based protection circuit—making it suitable for low-risk medical and wearable applications. For medical devices requiring ISO 13485 quality management and full batch traceability, discuss your specific requirements with our engineering team. We also offer medical-grade battery solutions on our custom medical batteries page.
Download AS401119 Certificates & Documentation
All AS401119 certification documents are available for immediate download. The core certificates are below; the full package (air transport report, sea transport report, UN38.3 summary, stacking test, drop test) is available on request.
- UL 1642 (File # MH 60807), IEC 62133, CE, RoHS, REACH, Halogen Free
- UN38.3 full test report + shipping summary (DSP26080635-2 / -3)
- MSDS (DSP26080635-1), 3M stacking test (DSP26080635-5), 1.2M drop test (DSP26080635-4)
- Air & sea transport identification reports
- Seiko S-8261-G3J PCM with Murata NTC temperature monitoring