What is UN38.3 and why is it required for the ETENWOLF C2 battery pack?

UN38.3 is a mandatory international transport safety standard defined in the United Nations Manual of Tests and Criteria. It requires lithium-ion battery packs to pass eight specific tests — altitude simulation, thermal stress, vibration, shock, short circuit, impact, overcharge, and forced discharge — before they can be legally transported by air, sea, or road. The ETENWOLF C2 battery pack (model 2S1P-2000) passed all applicable tests under Report No. WTH25D09239218B.

Which edition of the UN38.3 standard applies to this report?

This report was conducted against the Eighth Revision of the UN Manual of Tests and Criteria with Amendment, formally referenced as ST/SG/AC.10/11/Rev.8, Section 38.3.

What are the key electrical specifications of the ETENWOLF C2 battery pack?

The ETENWOLF C2 uses a 2S1P lithium-ion battery pack (model 2S1P-2000) rated at 7.4V and 2000mAh (14.8Wh). It accepts a maximum charge current of 2100mA and supports a maximum discharge current of 13000mA. The pack uses two INR18650-2000mAh-5C cells, measures 133.1mm x 19.6mm, and weighs approximately 117.6g.

Who conducted the UN38.3 testing and how can I verify the report?

Testing was performed by Waltek Testing Group Co., Ltd. in Dongguan, Guangdong, China. The report was tested by Jason Zhen, reviewed by Jack Chen, and approved by Deval Qin. Contact Waltek at info@waltek.com.cn or +86-769-2267 6998 to verify Report No. WTH25D09239218B.

UN38.3 Test Report for ETENWOLF C2 Lithium-ion Battery Pack (Report No. WTH25D09239218B)

Document Overview

Document Overview This page presents the official UN38.3 Test Report issued for the ETENWOLF C2 lithium-ion battery pack. The report was prepared by Waltek Testing Group Co., Ltd. (深圳沃特检验集团股份有限公司), an accredited third-party testing laboratory located at No. 77, Houjie Section, Guantai Rd., Houjie Town, Dongguan…

Document type: Certification Report
Prepared by: Michelle Torres
Published: July 22, 2026
Last reviewed: July 22, 2026
Topics: International Transportation: CB / MSDS / UN38.3

Document Overview

This page presents the official UN38.3 Test Report issued for the ETENWOLF C2 lithium-ion battery pack. The report was prepared by Waltek Testing Group Co., Ltd. (深圳沃特检验集团股份有限公司), an accredited third-party testing laboratory located at No. 77, Houjie Section, Guantai Rd., Houjie Town, Dongguan City, Guangdong, China.

Field	Detail
Report Number	WTH25D09239218B
Document Type	UN38.3 Test Report
Test Standard	ST/SG/AC.10/11/Rev.8, Section 38.3
Issuing Body	Waltek Testing Group Co., Ltd.
Applicant / Manufacturer	Guangdong Bestek Technology Co., LTD, No.1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R.China
Date of Sample Receipt	2025-09-08
Date of Testing	2025-09-11 to 2025-09-19
Date of Issue	2025-09-22
Overall Test Result	PASS — The submitted samples comply with the above standards

The report scope covers all mandatory UN38.3 test procedures (T1 through T8) applicable to small lithium-ion battery packs intended for air transport. Tests were conducted under controlled ambient conditions of 20°C–25°C temperature and 45%–75% relative humidity.

Product Information

The battery pack evaluated in this report is used in the ETENWOLF C2 portable inflation tool. It is a cylindrical lithium-ion battery pack configured in a 2-series, 1-parallel (2S1P) arrangement using INR18650 cells.

Parameter	Value
Product Name	Lithium-ion Battery Pack
Model Number	2S1P-2000
Nominal Voltage	7.4 V
Rated Capacity	2000 mAh
Energy	14.8 Wh
Standard Charge Current	1000 mA
Maximum Charge Voltage	5 V
Maximum Charge Current	2100 mA
Standard Discharge Current	9000 mA
Maximum Discharge Current	13000 mA
Discharge Cut-off Voltage	5.8 V
Dimensions	133.1 mm × 19.6 mm
Shape	Cylindrical
Mass	Approx. 117.6 g
Cell Model	INR18650-2000mAh-5C
Cell Rated Capacity	2000 mAh
Cell Configuration	2 cells — 2S1P

Key Details

All eight UN38.3 test procedures were executed on the ETENWOLF C2 battery pack model 2S1P-2000. The table below summarises each test, the sample groups used, their charge state, and the result.

Test	Description	Sample Groups	Sample State	Result
T1	Altitude Simulation (11.6 kPa, 23.9°C, ≥6 hours)	B01#–B04# / B05#–B08#	Fully charged — 1st cycle / 25th cycle	PASS
T2	Thermal Test (72±2°C and −40±2°C, 10 cycles, ≤30 min between extremes)	B01#–B04# / B05#–B08#	Fully charged — 1st cycle / 25th cycle	PASS
T3	Vibration	B01#–B04# / B05#–B08#	Fully charged — 1st cycle / 25th cycle	PASS
T4	Shock	B01#–B04# / B05#–B08#	Fully charged — 1st cycle / 25th cycle	PASS
T5	External Short Circuit	B01#–B04# / B05#–B08#	Fully charged — 1st cycle / 25th cycle	PASS
T6	Impact / Crush	C01#–C05# / C06#–C10#	50% rated capacity — 1st cycle / 25th cycle	PASS
T7	Overcharge	B09#–B12# / B13#–B16#	Fully charged — 1st cycle / 25th cycle	PASS
T8	Forced Discharge	C11#–C20# / C21#–C30#	Fully discharged — 1st cycle / 25th cycle	PASS

Mass loss assessment followed the standard formula: Mass loss (%) = (M1 − M2) / M1 × 100, where M1 is pre-test mass and M2 is post-test mass. For the 2S1P-2000 battery pack with a mass of approximately 117.6 g (≥75 g threshold), the permissible mass loss limit is 0.1%. All samples remained within this limit.

For Test T1 (Altitude Simulation), the requirement was met with no leakage, no venting, no disassembly, no rupture, and no fire observed across all sample groups, and post-test open-circuit voltage was not less than 90% of the pre-test voltage for all charged samples.

For Test T2 (Thermal Test), the battery pack cycled between 72±2°C and −40±2°C with a maximum transition interval of 30 minutes, repeated 10 times. All samples were subsequently stored at ambient temperature (20±5°C) for 24 hours before evaluation. No failures were recorded.

Standards & Compliance

The ETENWOLF C2 battery pack was tested against the following standard:

Standard	Full Title	Revision
UN38.3	United Nations Recommendations on the Transport of Dangerous Goods — Manual of Tests and Criteria, Section 38.3: Lithium Metal and Lithium-ion Batteries	Eighth Revision (ST/SG/AC.10/11/Rev.8) with Amendment

UN38.3 certification is a mandatory international requirement for the safe transport of lithium batteries by air, sea, and road. It verifies that the battery pack can withstand the conditions encountered during transportation without leakage, fire, rupture, or explosion. The eighth revision of the Manual of Tests and Criteria is the applicable edition for this report.

Test procedures covered under this certification include altitude simulation, thermal cycling, mechanical vibration, mechanical shock, external short circuit, impact, overcharge, and forced discharge — all eight procedures required for a battery pack of this type and size.

The testing laboratory, Waltek Testing Group Co., Ltd., operates under accreditation and follows internal procedure WT-510-201-02-B. The report is invalid if altered, if the approver’s signature is absent, or if the laboratory’s official inspection seal is not affixed.

Validity & Certification Body

Field	Detail
Report Number	WTH25D09239218B
Date of Issue	2025-09-22
Testing Laboratory	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 Rd., 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]
Tested By	甄锦炎 (Jason Zhen)
Reviewed By	陈咏松 (Jack Chen)
Approved By	秦林伟 (Deval Qin)
Internal Procedure Reference	WT-510-201-02-B

This test report is valid for the specific sample batch tested. It covers the samples submitted by Guangdong Bestek Technology Co., LTD and is applicable to the battery pack model 2S1P-2000 as used in the ETENWOLF C2. The report may not be partially reproduced without prior written permission from Waltek Testing Group Co., Ltd. Any alteration, addition, deletion, absence of the approver’s signature, or missing official seal renders the report invalid.

If the report does not carry the accreditation recognition seal, it is limited to use in scientific research, education, and internal quality control activities, and may not be used as evidentiary data for external purposes.

Frequently Asked Questions

What is UN38.3 and why is it required for the ETENWOLF C2 battery pack?: UN38.3 is a mandatory international transport safety standard defined in the United Nations Manual of Tests and Criteria. It requires lithium-ion battery packs to pass eight specific tests — covering altitude simulation, thermal stress, vibration, shock, short circuit, impact, overcharge, and forced discharge — before they can be legally transported by air, sea, or road. The ETENWOLF C2 battery pack (model 2S1P-2000) has passed all applicable tests under Report No. WTH25D09239218B, confirming it meets this global requirement.
Which edition of the UN38.3 standard applies to this report?: This report was conducted against the Eighth Revision of the UN Manual of Tests and Criteria, with Amendment — formally referenced as ST/SG/AC.10/11/Rev.8, Section 38.3. This is the most current edition applicable at the time of testing in September 2025.
What are the key electrical specifications of the ETENWOLF C2 battery pack?: The ETENWOLF C2 uses a 2S1P lithium-ion battery pack (model 2S1P-2000) rated at 7.4 V and 2000 mAh (14.8 Wh). It accepts a maximum charge current of 2100 mA and supports a maximum discharge current of 13000 mA. The pack uses two INR18650-2000mAh-5C cells in a cylindrical form factor measuring 133.1 mm × 19.6 mm and weighing approximately 117.6 g.
Who conducted the UN38.3 testing and how can I verify the report?: The testing was performed by Waltek Testing Group Co., Ltd., an accredited third-party laboratory based in Dongguan, Guangdong, China. The report was tested by Jason Zhen, reviewed by Jack Chen, and approved by Deval Qin. You can contact Waltek directly at [email protected] or +86-769-2267 6998 to verify Report No. WTH25D09239218B. The report is valid only when it carries the laboratory’s official inspection seal and all required signatures.