Document Overview
Document Overview This page presents the findings of IEC 62133-2 safety test report WTH25D05118920B, issued by Waltek Testing Group Co., Ltd. on 2025-05-28. The report covers a lithium-ion battery pack intended for built-in use in portable applications and evaluates compliance with the international rechargeable battery…
- Document type
- Certification Report
- Prepared by
- Michelle Torres
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- Last reviewed
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- Lighting Gear
Document Overview
This page presents the findings of IEC 62133-2 safety test report WTH25D05118920B, issued by Waltek Testing Group Co., Ltd. on 2025-05-28. The report covers a lithium-ion battery pack intended for built-in use in portable applications and evaluates compliance with the international rechargeable battery safety standard IEC 62133-2:2017+AMD1:2021. Samples were received on 2025-05-14, and testing was conducted between 2025-05-14 and 2025-05-23 at Waltek’s laboratory in Dongguan, Guangdong, China. The overall test result is PASS — the submitted samples comply with all applicable requirements of the standard.
The report was compiled by Jacky Sun (Project Engineer) and approved by Deval Qin (Designated Reviewer). The full report spans 26 pages including three pages of photo documentation as Attachment 1. This report cannot be reproduced except in full without prior written permission from Waltek Testing Group Co., Ltd.
Product Information
The product under test is the ETENWOLF L1 lithium-ion battery pack, manufactured and supplied by Guangdong Bestek Technology Co., Ltd., located at No. 1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R. China.
| Parameter | Cell (XD 122050) | Battery Pack (1S1P-1500) |
|---|---|---|
| Nominal Voltage | 3.8 V | 3.8 V |
| Rated Capacity | 1500 mAh | 1500 mAh |
| Energy | — | 5.7 Wh |
| Charge Method | CC/CV | CC/CV (Type-C Input: 5 V / 1.5 A) |
| Charge Temp. Range | 0 – 45 °C | 0 – 45 °C |
| Standard Charge Current | 300 mA | Type-C: 5 V / 1.5 A |
| Max. Charge Current | 3000 mA | Type-C: 5 V / 1.5 A |
| Max. Discharge Current | 3000 mA | 3000 mA |
| Upper Limit Charge Voltage | 4.4 V | Type-C: 5.25 V |
| End-of-Charge Current | 75 mA | 75 mA |
| Discharge Cut-off Voltage | 3.0 V | 3.0 V |
| Dimensions | 50.0 × 22.0 × 12.0 mm | 51.5 × 22.0 × 12.0 mm |
| Weight | Approx. 23.4 g | Approx. 31.2 g |
| Shape | Prismatic | Prismatic |
| Electrolyte Type | Gel Polymer | — |
The battery label carries the following marking: Lithium-ion Battery Pack, Model: 1S1P-1500 (1ICP12/22/50), Rating: 3.8 V, 1500 mAh, 5.7 Wh, Date Code: 2025-05, Manufacturer: Guangdong Bestek Technology Co., Ltd. Safety cautions on the label instruct users not to disassemble, modify, short-circuit, dispose of in fire, or expose the pack to high temperatures.
Key Details
The following table summarises all test clauses performed under IEC 62133-2:2017+AMD1:2021, the applicable sub-clause reference, and the verdict for each test.
| Clause | Test Name | Scope | Verdict |
|---|---|---|---|
| 4 | Parameter Measurement Tolerances | All control and measurement values within tolerances | Pass |
| 5.1 | General Safety Considerations | General design review | Pass |
| 5.2 | Insulation and Wiring | Internal wiring withstands max. current, voltage, and temperature; adequate creepage and clearance; mechanical integrity | Pass |
| 5.3 | Venting | Pressure relief mechanism prevents rupture, explosion, and self-ignition | Pass |
| 5.4 | Temperature / Voltage / Current Management | Abnormal temperature rise prevention; within cell manufacturer limits | Pass |
| 7.2.1 | Continuous Charging at Constant Voltage | Cells | Pass |
| 7.2.2 | Case Stress at High Ambient Temperature | Battery | Pass |
| 7.3.1 | External Short-Circuit | Cell | Pass |
| 7.3.2 | External Short-Circuit | Battery | Pass |
| 7.3.3 | Free Fall | Battery | Pass |
| 7.3.4 | Thermal Abuse | Cells | Pass |
| 7.3.5 | Crush | Cells | Pass |
| 7.3.6 | Over-Charging of Battery | Battery | Pass |
| 7.3.7 | Forced Discharge | Cells | Pass |
| 7.3.8.1 | Vibration | Battery | Pass |
| 7.3.8.2 | Mechanical Shock | Battery | Pass |
| 7.3.9 | Design Evaluation – Forced Internal Short Circuit | Cells | Pass |
Additional installation and use classification details: the battery pack is designated for built-in use in portable applications. The supply connection type is a DC connector. The recommended charging method declared by the manufacturer is via integrated circuit using a Type-C input at 5 V / 1.5 A until the digital tube display reads 100%.
Standards & Compliance
The ETENWOLF L1 battery pack was tested against the following standard:
- IEC 62133-2:2017+AMD1:2021 — Safety requirements for portable sealed secondary lithium cells and batteries for use in portable applications — Part 2: Lithium systems.
The product also fulfils the requirements of EN 62133-2:2017+AMD1:2021, confirming alignment with the European harmonised version of the standard. No national differences were applicable (Summary of Compliance with National Differences: N/A).
Key test parameters used during compliance evaluation are listed below:
- Discharge current (0.2 It A): 300 mA
- Specified final (cut-off) voltage: 3.0 V
- Upper limit charging voltage per cell: 4.4 V
- Maximum charging current: 3000 mA
- Charging temperature range: 0 °C to 45 °C
Verdict notation used throughout the report: P = Pass, F = Fail, N/A = test case does not apply to the test object.
Validity & Certification Body
The test report WTH25D05118920B was issued on 2025-05-28 and remains valid as long as the product design, materials, and manufacturing process remain unchanged from those submitted for testing. Any modification to the product may require re-evaluation.
Testing Laboratory:
Waltek Testing Group Co., Ltd.
No. 77, Houjie Section, Guantai Road, Houjie Town, Dongguan City, Guangdong, China
Tel: +86-769-2267 6998 | Fax: +86-769-2267 6828
Website: www.waltek.com.cn
Applicant & Manufacturer:
Guangdong Bestek Technology Co., Ltd.
No. 1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R. China
The report is valid only when bearing the specific stamp of the test institute together with the signatures of both the compiler (Jacky Sun, Project Engineer) and the approver (Deval Qin, Designated Reviewer). Reproduction of this report, except in full, requires prior written permission from Waltek Testing Group Co., Ltd.
Frequently Asked Questions
- What does IEC 62133-2 certification mean for the ETENWOLF L1 battery pack?
-
IEC 62133-2 is the international safety standard for portable sealed secondary lithium cells and batteries. Achieving a Pass result under report WTH25D05118920B confirms that the ETENWOLF L1 battery pack has been independently verified to withstand mechanical, thermal, and electrical abuse conditions without rupture, fire, or explosion — meeting the requirements for safe use in portable applications.
- Which specific safety tests did the ETENWOLF L1 battery pass?
-
The battery pack passed all 17 test clauses including external short-circuit (cell and battery levels), free fall, thermal abuse, crush, over-charging, forced discharge, vibration, mechanical shock, forced internal short circuit (design evaluation), continuous charging at constant voltage, and case stress at high ambient temperature, all conducted under IEC 62133-2:2017+AMD1:2021.
- What are the charging specifications for the 1S1P-1500 battery pack?
-
The 1S1P-1500 battery pack should be charged via a Type-C input at 5 V / 1.5 A using CC/CV method. Charging must remain within the temperature range of 0 °C to 45 °C. The upper limit input voltage is 5.25 V (Type-C), and charging should stop when the end-of-charge current drops to 75 mA or the digital tube display reaches 100%.
- Is this test report valid for European market compliance?
-
Yes. The test report confirms compliance with EN 62133-2:2017+AMD1:2021, the European harmonised version of the standard. This supports the technical documentation required for CE marking of portable lithium battery products in the European market. No country-specific national differences were identified as applicable.
Related Documents
For a complete regulatory and safety compliance picture of the ETENWOLF L1, the following related certification and test report types are recommended:
- UN 38.3 Transport Test Report — Required for air, sea, and road transport of lithium batteries. Covers altitude simulation, thermal test, vibration, shock, external short circuit, impact, overcharge, and forced discharge under UN 38.3 from the UN Manual of Tests and Criteria.
- CE Declaration of Conformity — Required for placing the product on the European market, referencing applicable EU directives such as the Battery Regulation and applicable harmonised standards including EN 62133-2.
- RoHS Compliance Report — Confirms restriction of hazardous substances (lead, mercury, cadmium, hexavalent chromium, PBB, PBDE) under EU RoHS Directive 2011/65/EU.
- REACH SVHC Declaration — Confirms that the product does not contain Substances of Very High Concern above threshold levels under REACH Regulation (EC) No 1907/2006.
- FCC / IC Radio Frequency Report — If the end-product incorporating this battery includes wireless functionality, an FCC equipment authorisation report would be required for US market access.
- KC Certification — Required for South Korean market entry, covering electrical safety and electromagnetic compatibility for lithium battery-powered portable devices.
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