Document Overview
Document Overview This page presents the findings of an official IEC 62133-2 safety test report issued by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory based in Dongguan, Guangdong, China. The report covers compliance testing for a lithium-ion battery pack intended for portable…
- Document type
- Certification Report
- Prepared by
- Michelle Torres
- Published
- Last reviewed
- Topics
- International Transportation: CB / MSDS / UN38.3
Document Overview
This page presents the findings of an official IEC 62133-2 safety test report issued by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory based in Dongguan, Guangdong, China. The report covers compliance testing for a lithium-ion battery pack intended for portable applications.
| Field | Detail |
|---|---|
| Reference Number | WTH25D09239213B |
| Document Type | IEC 62133-2 Safety Test Report |
| Issuing Laboratory | Waltek Testing Group Co., Ltd. |
| Date of Issue | 2025-09-29 |
| Date of Receipt of Sample | 2025-09-08 |
| Test Period | 2025-09-11 to 2025-09-19 |
| Standard Applied | IEC 62133-2:2017+AMD1:2021 |
| Overall Test Result | PASS — The submitted samples comply with the above standard |
The report was compiled by Jason Zhen (Project Engineer) and approved by Deval Qin (Designated Reviewer) at Waltek Testing Group. The total report length is 25 pages, including 3 pages of photo documentation as Attachment 1.
Product Information
The tested product is a lithium-ion battery pack manufactured by Guangdong Bestek Technology Co., Ltd. and sold under the ETENWOLF C2 brand. The battery pack is classified for built-in use in portable applications and uses a DC wire supply connection.
| Parameter | Cell (INR18650-2000mAh-5C) | Battery Pack (2S1P-2000) |
|---|---|---|
| Nominal Voltage | 3.7 V | 7.4 V |
| Rated Capacity | 2000 mAh | 2000 mAh |
| Energy Rating | — | 14.8 Wh |
| Charge Method | CC/CV | CC/CV |
| Standard Charge Current | 1000 mA | 1000 mA |
| Maximum Charge Current | 2100 mA | 2100 mA |
| Maximum Discharge Current | 13000 mA | 13000 mA |
| Upper Limit Charge Voltage | 4.22 V | 8.44 V |
| End-of-Charge Current | 40 mA | 40 mA |
| Discharge Cut-off Voltage | 2.9 V | 5.8 V |
| Charging Temperature Range | 0–45 °C | 0–45 °C |
| Dimensions | Φ18.2 mm × 65.3 mm | Φ19.6 mm × 133.1 mm |
| Weight | Approx. 42.4 g | Approx. 117.6 g |
| Shape | Cylindrical | Cylindrical |
| Cell Designation | INR19/66 | 2INR19/66 (2S1P) |
The manufacturer-declared charging method is: charge at a constant current of 1000 mA until voltage reaches 5 V, then charge at a constant voltage of 5 V until the current reduces to 40 mA. The discharge test current (0.2 It A) used during evaluation was 400 mA.
Key Details
The following table summarises all test clauses performed under IEC 62133-2:2017+AMD1:2021 and their individual verdicts. All tests were conducted at the Waltek Testing Group facility in Dongguan, Guangdong, China.
| Clause | Test Name | Verdict |
|---|---|---|
| 4 | Parameter Measurement Tolerances — all control and measured values within tolerances | Pass |
| 5.1 | General Safety Considerations — General | Pass |
| 5.2 | Insulation and Wiring — internal wiring, insulation, creepage and clearance distances, mechanical integrity | Pass |
| 5.3 | Venting — pressure relief mechanism; encapsulation review | Pass |
| 5.4 | Temperature / Voltage / Current Management — abnormal temperature rise prevention; limits compliance | 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 | Pass |
| 7.3.4 | Thermal Abuse (cells) | Pass |
| 7.3.5 | Crush (cells) | Pass |
| 7.3.6 | Over-Charging of Battery | Pass |
| 7.3.7 | Forced Discharge (cells) | Pass |
| 7.3.8.1 | Vibration | Pass |
| 7.3.8.2 | Mechanical Shock | Pass |
| 7.3.9 | Design Evaluation — Forced Internal Short Circuit (cells) | Pass |
The product label (marking plate) identifies the battery as: Lithium-ion Battery Pack, Model: 2S1P-2000 (2INR19/66), Rating: 7.4 V, 2000 mAh, 14.8 Wh. Safety cautions on the label instruct users not to disassemble, modify, short-circuit, dispose in fire, or expose to high temperatures.
Standards & Compliance
The ETENWOLF C2 battery pack was evaluated against the following international safety standard:
| Standard | Full Title | Scope |
|---|---|---|
| IEC 62133-2:2017+AMD1:2021 | Secondary cells and batteries containing alkaline or other non-acid electrolytes — Safety requirements for portable sealed secondary lithium cells, and for batteries made from them, for use in portable applications — Part 2: Lithium systems | Portable lithium-ion battery packs used in consumer electronics and portable tools |
The report also confirms fulfillment of EN 62133-2:2017+AMD1:2021, the harmonised European version of the standard, which supports CE marking requirements for the European market. No national differences or country-specific deviations were noted (Summary of Compliance with National Differences: N/A).
Test verdict key used throughout the report:
- P (Pass) — Test object meets the requirement
- F (Fail) — Test object does not meet the requirement
- N/A — Test case does not apply to the test object
Validity & Certification Body
This test report was issued on 2025-09-29 and is valid as a point-in-time evaluation of the specific sample batch received on 2025-09-08. As is standard for IEC test reports, validity is contingent on no changes being made to the product design, materials, or manufacturing process. Any such changes would require re-evaluation.
| Field | Detail |
|---|---|
| Issuing Laboratory | Waltek Testing Group Co., Ltd. |
| Laboratory Address | No. 77, Houjie Section, Guantai Road, Houjie Town, Dongguan City, Guangdong, China |
| Telephone | +86-769-2267 6998 |
| Fax | +86-769-2267 6828 |
| Website | http://www.waltek.com.cn |
| Compiled By | Jason Zhen — Project Engineer |
| Approved By | Deval Qin — Designated Reviewer |
| Report Reference No. | WTH25D09239213B |
| Applicant | Guangdong Bestek Technology Co., Ltd., No.1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R. China |
| Manufacturer | Guangdong Bestek Technology Co., Ltd. (same address as applicant) |
This report may not be reproduced except in full, and only with prior written permission from Waltek Testing Group. The report is invalid without the specific stamp of the test institute and the signatures of the compiler and approver.
Frequently Asked Questions
- What does IEC 62133-2 certification mean for the ETENWOLF C2 battery pack?
-
IEC 62133-2 is the internationally recognised safety standard for portable lithium-ion battery packs. Passing this standard means the ETENWOLF C2 battery has been independently verified to withstand a comprehensive set of abuse and stress conditions — including short-circuit, overcharge, crush, thermal abuse, free fall, vibration, and mechanical shock — without posing a safety risk. It is a key requirement for market access in Europe and many other regions.
- Which specific tests did the 2S1P-2000 battery pack pass?
-
The battery pack passed all 17 applicable test clauses under IEC 62133-2:2017+AMD1:2021, including: continuous constant-voltage charging, high-temperature case stress, external short-circuit (cell and pack level), free fall, thermal abuse, crush, overcharge, forced discharge, vibration, mechanical shock, and forced internal short-circuit design evaluation. No failures were recorded.
- What are the safe operating limits for charging the C2 battery pack?
-
The battery pack should be charged using a CC/CV method: constant current at 1000 mA until the pack voltage reaches 8.44 V (4.22 V per cell), then constant voltage until the current tapers to 40 mA. The maximum permissible charge current is 2100 mA. Charging must only take place within the temperature window of 0 °C to 45 °C. Charging outside these parameters may compromise safety and is not covered by the test validation.
- Is this test report sufficient for CE marking or export compliance?
-
This report confirms conformance with EN 62133-2:2017+AMD1:2021, which is the harmonised European standard and directly supports CE marking declarations for battery-powered portable devices. For complete CE marking, the Declaration of Conformity must also reference other applicable directives such as the Battery Directive or relevant EMC and low-voltage directives depending on the end product. For other markets, additional certifications such as KC (Korea), UN 38.3 (transport), or UL (North America) may be required.
Related Documents
The following certification and compliance documents are typically required alongside an IEC 62133-2 test report for a lithium-ion battery pack such as the ETENWOLF C2:
- UN 38.3 Transport Test Report — Mandatory for air and sea transport of lithium-ion batteries; covers altitude simulation, thermal test, vibration, shock, external short-circuit, impact, overcharge, and forced discharge.
- CE Declaration of Conformity — Required for sale in the European Economic Area; must reference IEC/EN 62133-2 and any other applicable directives.
- IEC 62368-1 Report — Relevant if the battery pack is integrated into audio/video, information, or communication technology equipment.
- RoHS Compliance Certificate — Confirms the battery pack is free from restricted hazardous substances including lead, mercury, cadmium, and certain flame retardants.
- REACH SVHC Declaration — Required for the European market to confirm absence or controlled presence of Substances of Very High Concern under REACH Regulation (EC) No 1907/2006.
- KC Certification (KCs mark) — Required for sale in South Korea; covers electrical safety of portable lithium-ion battery packs.
- MSDS / Safety Data Sheet — Product-level document detailing hazardous properties, handling instructions, and emergency response procedures for the lithium-ion battery chemistry.
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