What is UN38.3 and why does the ETENWOLF C2PRO battery pack need it?

UN38.3 is the section of the UN Manual of Tests and Criteria that defines mandatory safety tests for lithium cells and batteries intended for transport. It is required by IATA, IMDG, and ADR regulations before lithium-ion battery packs — such as the one powering the ETENWOLF C2PRO — can be legally shipped by air, sea, or road internationally. Without a valid UN38.3 test report, carriers will refuse the shipment.

Which tests are included in UN38.3 and did the C2PRO battery pass all of them?

UN38.3 comprises eight mandatory tests: T1 Altitude Simulation, T2 Thermal Test, T3 Vibration, T4 Shock, T5 External Short Circuit, T6 Impact, T7 Overcharge, and T8 Forced Discharge. According to report WTH25D11289146B, the 2S1P-2600 battery pack used in the ETENWOLF C2PRO passed all eight tests with no leakage, no venting, no rupture, and no fire observed in any test.

What are the key electrical specifications of the C2PRO battery pack tested?

The tested battery pack (model 2S1P-2600) is rated at 7.4V, 2600mAh, and 19.24Wh. It uses two ICR18650 cells in a 2-series, 1-parallel configuration, with a maximum charge voltage of 8.4V, a maximum discharge current of 13,000mA, and a discharge cut-off voltage of 5.5V. Total mass is approximately 125.7g.

How long is this UN38.3 test report valid, and who issued it?

UN38.3 test reports do not carry a fixed expiry date under the standard itself, but remain valid as long as the product design, cell model, and configuration are unchanged. Report WTH25D11289146B was issued on 2026-01-25 by Waltek Testing Group Co., Ltd., an accredited laboratory in Dongguan, Guangdong, China. Any change to the battery cell model, configuration, or key electrical parameters would require a new test report.

UN38.3 Test Report for ETENWOLF C2PRO Lithium-ion Battery Pack (Model 2S1P-2600) — Waltek Testing Group

Document Overview

Document Overview This page presents the official UN38.3 Test Report issued by Waltek Testing Group Co., Ltd. (深圳沃特检验集团股份有限公司) for a lithium-ion battery pack used in the ETENWOLF C2PRO inflation tool. The report covers transport safety qualification testing required for lithium cells and battery packs shipped…

Document type: Certification Report
Prepared by: Michelle Torres
Published: July 24, 2026
Last reviewed: July 24, 2026
Topics: International Transportation: CB / MSDS / UN38.3

Document Overview

This page presents the official UN38.3 Test Report issued by Waltek Testing Group Co., Ltd. (深圳沃特检验集团股份有限公司) for a lithium-ion battery pack used in the ETENWOLF C2PRO inflation tool. The report covers transport safety qualification testing required for lithium cells and battery packs shipped by air under the UN Recommendations on the Transport of Dangerous Goods — Manual of Tests and Criteria, Eighth Revised Edition, Section 38.3 (ST/SG/AC.10/11/Rev.8).

Field	Detail
Report Number	WTH25D11289146B
Document Type	UN38.3 Test Report
Issuing Laboratory	Waltek Testing Group Co., Ltd., Dongguan, Guangdong, China
Test Specification	ST/SG/AC.10/11/Rev.8, Section 38.3 (Eighth Revision, Amendment)
Date of Sample Receipt	2025-11-04
Testing Period	2025-11-04 to 2025-11-13
Date of Issue	2026-01-25
Overall Test Result	PASS — The submitted samples comply with the above standards

Product Information

The battery pack evaluated in this report is designed for use in the ETENWOLF C2PRO portable inflation tool. It is a cylindrical lithium-ion battery pack configured in a 2-series, 1-parallel (2S1P) arrangement using ICR18650 cells.

Parameter	Value
Product Name	Lithium-ion Battery Pack
Model Number	2S1P-2600
Cell Model	ICR18650 2600mAh
Cell Configuration	2 cells, 2S1P
Rated Voltage	7.4 V
Rated Capacity	2600 mAh
Energy Rating	19.24 Wh
Maximum Charge Voltage	8.4 V
Standard Charge Current	2000 mA
Maximum Charge Current	2100 mA
Standard Discharge Current	9000 mA
Maximum Discharge Current	13000 mA
Discharge Cut-off Voltage	5.5 V
Form Factor	Cylindrical
Dimensions	132.5 mm × 19.5 mm
Mass	Approx. 125.7 g
Applicant / Manufacturer	Guangdong Bestek Technology Co., Ltd., No. 1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R. China

Key Details

The test report covers all mandatory UN38.3 test procedures performed on sample groups in defined charge states. The following table summarises the test items, sample assignments, and sample states used during evaluation.

Test Item	Sample Numbers	Sample State
T1–T5 (Altitude, Thermal, Vibration, Shock, External Short Circuit)	B01#–B04#	1st charge/discharge cycle, fully charged
T1–T5	B05#–B08#	After 25 cycles, fully charged
T6 (Impact)	C01#–C05#	1st cycle, 50% of design rated capacity
T6	C06#–C10#	After 25 cycles, 50% of design rated capacity
T7 (Overcharge)	B09#–B12#	1st cycle, fully charged
T7	B13#–B16#	After 25 cycles, fully charged
T8 (Forced Discharge)	C11#–C20#	1st cycle, fully discharged
T8	C21#–C30#	After 25 cycles, fully discharged

Key individual test conditions and outcomes are summarised below:

Test	Condition	Requirement	Result
T1 — Altitude Simulation	11.6 kPa, 23.6°C, ≥6 hours	No leakage, no venting, no disassembly, no rupture, no fire; OCV ≥ 90% of pre-test voltage	PASS
T2 — Thermal Test	Cycling between 72±2°C (≥6h) and −40±2°C (≥6h), max 30-min transition, 10 repetitions; stored 24h at 20±5°C after test	No leakage, no venting, no disassembly, no rupture, no fire; OCV ≥ 90% of pre-test voltage	PASS
T3 — Vibration	Per ST/SG/AC.10/11/Rev.8 38.3.4.3	No leakage, no venting, no disassembly, no rupture, no fire; OCV ≥ 90% of pre-test voltage	PASS
T4 — Shock	Per ST/SG/AC.10/11/Rev.8 38.3.4.4	No leakage, no venting, no disassembly, no rupture, no fire; OCV ≥ 90% of pre-test voltage	PASS
T5 — External Short Circuit	Per ST/SG/AC.10/11/Rev.8 38.3.4.5	No disassembly, no rupture, no fire; temperature ≤ 170°C	PASS
T6 — Impact	Per ST/SG/AC.10/11/Rev.8 38.3.4.6	No disassembly, no rupture, no fire	PASS
T7 — Overcharge	Per ST/SG/AC.10/11/Rev.8 38.3.4.7	No disassembly, no fire	PASS
T8 — Forced Discharge	Per ST/SG/AC.10/11/Rev.8 38.3.4.8	No disassembly, no rupture, no fire	PASS

Test environment conditions throughout: ambient temperature 20°C–25°C, relative humidity 45%–75%. No subcontracted testing was conducted. Mass loss acceptance thresholds applied: <1 g cells — 0.5%; 1 g ≤ M ≤ 75 g — 0.2%; M ≥ 75 g — 0.1%.

Standards & Compliance

The ETENWOLF C2PRO battery pack (model 2S1P-2600) was tested in full compliance with the following standard:

Standard	Full Title	Scope
ST/SG/AC.10/11/Rev.8, Section 38.3	UN Recommendations on the Transport of Dangerous Goods — Manual of Tests and Criteria, Eighth Revised Edition, Section 38.3 Amendment	Safety testing of lithium cells and batteries for transport by all modes, including air freight

UN38.3 compliance is a mandatory prerequisite for the international transport of lithium-ion batteries. The eight test procedures (T1–T8) collectively assess resistance to low pressure, extreme temperature, vibration, mechanical shock, external short circuit, mechanical impact, overcharge, and forced discharge. All eight tests were completed with a PASS verdict for the 2S1P-2600 battery pack.

The test protocol followed the procedure sequence requirements of clause 38.3.4: Tests T1–T5 were conducted in sequence on the same battery samples; Tests T6 and T8 used previously untested batteries; Test T7 used undamaged batteries previously cycled through T1–T5.

Validity & Certification Body

This test report was issued by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory based in China. The report bears the signatures of the testing team and the approval of the authorised signatory.

Field	Detail
Report Reference Number	WTH25D11289146B
Date of Issue	2026-01-25
Tested By	Jason Zhen (甄锦炎)
Reviewed By	Jack Chen (陈咏松)
Approved By	Deval Qin (秦林伟)
Laboratory Name	Waltek Testing Group Co., Ltd. (深圳沃特检验集团股份有限公司)
Laboratory Address	No. 77, Houjie Section, Guantai Road, Houjie Town, Dongguan City, Guangdong, China
Laboratory Website	http://www.waltek.com.cn
Telephone	+86-769-2267 6998
Fax	+86-769-2267 6828
Email	[email protected]
Internal Document Reference	WT-510-201-02-B

Important notice: This test report is valid only for the specific samples tested. It may not be partially reproduced without prior written permission from Waltek Testing Group. The report is invalid if altered, annotated, unsigned by the approver, or not stamped with the laboratory’s official accreditation seal. Where the accreditation seal is absent, the report is for internal quality control, research, or educational purposes only and may not be used as externally submitted supporting evidence.

Frequently Asked Questions

What is UN38.3 and why does the ETENWOLF C2PRO battery pack need it?: UN38.3 is the section of the UN Manual of Tests and Criteria that defines mandatory safety tests for lithium cells and batteries intended for transport. It is required by IATA, IMDG, and ADR regulations before lithium-ion battery packs — such as the one powering the ETENWOLF C2PRO — can be legally shipped by air, sea, or road internationally. Without a valid UN38.3 test report, carriers will refuse the shipment.
Which tests are included in UN38.3 and did the C2PRO battery pass all of them?: UN38.3 comprises eight mandatory tests: T1 Altitude Simulation, T2 Thermal Test, T3 Vibration, T4 Shock, T5 External Short Circuit, T6 Impact, T7 Overcharge, and T8 Forced Discharge. According to report WTH25D11289146B, the 2S1P-2600 battery pack used in the ETENWOLF C2PRO passed all eight tests with no leakage, no venting, no rupture, and no fire observed in any test.
What are the key electrical specifications of the C2PRO battery pack tested?: The tested battery pack (model 2S1P-2600) is rated at 7.4 V, 2600 mAh, and 19.24 Wh. It uses two ICR18650 cells in a 2-series, 1-parallel configuration, with a maximum charge voltage of 8.4 V, a maximum discharge current of 13,000 mA, and a discharge cut-off voltage of 5.5 V. Total mass is approximately 125.7 g.
How long is this UN38.3 test report valid, and who issued it?: UN38.3 test reports do not carry a fixed expiry date under the standard itself, but they remain valid as long as the product design, cell model, and configuration are unchanged. Report WTH25D11289146B was issued on 2026-01-25 by Waltek Testing Group Co., Ltd., an accredited laboratory in Dongguan, Guangdong, China. Any change to the battery cell model, configuration, or key electrical parameters would require a new test report.