What is UN38.3 certification and why does the X5PRO need it?

UN38.3 is a mandatory international safety standard under the United Nations Recommendations on the Transport of Dangerous Goods. It specifies eight tests that lithium batteries must pass before they can be legally transported by air. The ETENWOLF X5PRO contains a 14.8V lithium polymer battery pack, so UN38.3 certification is required for IATA-compliant air freight and international shipping.

What are the key battery specifications of the X5PRO that were tested?

The X5PRO battery pack tested under report WTH25D12334288B has a rated voltage of 14.8V, a rated capacity of 1500mAh, and an energy rating of 22.2Wh. It uses four lithium polymer cells (model 503880) in a 4S1P configuration, with a maximum charge voltage of 16.8V and a discharge cut-off voltage of 12V. The unit weighs approximately 824.8g and measures 168.0mm x 114.7mm x 67.4mm.

Which laboratory conducted the UN38.3 tests for the X5PRO?

All tests were performed by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory based in Dongguan, Guangdong, China. Testing ran from 2025-12-16 to 2025-12-25, and the report was officially issued on 2026-01-14 under report number WTH25D12334288B.

Does the X5PRO battery pack pass all eight UN38.3 test procedures?

Yes. According to report WTH25D12334288B, the ETENWOLF X5PRO battery pack achieved a PASS verdict on all applicable UN38.3 test items T.1 through T.8, covering altitude simulation, thermal testing, vibration, mechanical shock, external short circuit, impact, overcharge, and forced discharge.

UN38.3 Test Report for ETENWOLF X5PRO Jump Starter with Air Compressor — Battery Pack Certification

Document Overview

Document Overview This article 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), a professional third-party testing laboratory headquartered in Dongguan, Guangdong, China. The report covers mandatory lithium battery transport safety testing required for air freight and international shipment under…

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 article 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), a professional third-party testing laboratory headquartered in Dongguan, Guangdong, China. The report covers mandatory lithium battery transport safety testing required for air freight and international shipment under the United Nations Recommendations on the Transport of Dangerous Goods.

Field	Detail
Report Number	WTH25D12334288B
Document Type	UN38.3 Test Report
Issuing Body	Waltek Testing Group Co., Ltd.
Applicant / Manufacturer	Guangdong Bestek Technology Co., Ltd.
Manufacturer Address	No. 1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R. China
Date of Sample Receipt	2025-12-16
Date of Testing	2025-12-16 to 2025-12-25
Date of Issue	2026-01-14
Overall Test Result	PASS — The submitted samples comply with the above standards

The test was conducted in accordance with ST/SG/AC.10/11/Rev.8 Section 38.3 (Eighth Revised Edition with Amendment), which is the globally recognised standard for certifying lithium cells and batteries for safe transport by air.

Product Information

The tested product is the ETENWOLF X5PRO Jump Starter with Air Compressor (多合一启充宝), a multi-function portable power device combining vehicle jump-start capability with an integrated air compressor. The battery pack is a 4-cell lithium polymer configuration arranged in a 4S1P topology.

Specification	Value
Product Name	Jump Starter with Air Compressor
Model Number	X5 PRO
Rated Voltage	14.8 V
Rated Capacity	1500 mAh
Energy Rating	22.2 Wh
Maximum Charge Voltage	16.8 V
Standard Charge Current	750 mA
Maximum Charge Current	1500 mA
Standard Discharge Current	750 mA
Maximum Discharge Current	1500 mA
Discharge Cut-off Voltage	12 V
Cell Model	503880
Cell Rated Capacity	1500 mAh
Cell Count & Configuration	4 Pcs, 4S1P
Dimensions	168.0 mm × 114.7 mm × 67.4 mm
Shape	Almost Cuboid
Mass	Approx. 824.8 g
Trade Mark	—

The X5PRO is designed for consumer and professional use in automotive emergency situations, providing both battery jump-start power and tyre inflation functionality in a single portable unit.

Key Details

Testing was performed on multiple sample batches representing two charge-cycle states — samples at the first charge/discharge cycle and samples after 25 charge/discharge cycles — to verify performance consistency over time. The test environment maintained an ambient temperature of 20°C–25°C and relative humidity of 45%–75% throughout all procedures. No subcontracted testing was involved.

Test Sample Allocation

Test Item	Sample Numbers	Sample State
T1–T5	B01#–B04#	1st charge/discharge cycle, fully charged
T1–T5	B05#–B08#	After 25 cycles, fully charged
T6	C01#–C05#	1st cycle at 50% of design rated capacity
T6	C06#–C10#	After 25 cycles at 50% of design rated capacity
T7	B09#–B12#	1st cycle, fully charged (previously used in T1–T5)
T7	B13#–B16#	After 25 cycles, fully charged (previously used in T1–T5)
T8	C11#–C20#	1st cycle, fully discharged
T8	C21#–C30#	After 25 cycles, fully discharged

Mass Loss Criteria Applied

Cell or Battery Mass (M)	Maximum Permitted Mass Loss
M < 1 g	0.5%
1 g ≤ M ≤ 75 g	0.2%
M ≥ 75 g	0.1%

Individual Test Results Summary

Test	Name	Key Procedure Parameters	Verdict
T.1	Altitude Simulation	11.6 kPa, 23.4°C ambient, ≥6 hours stored	PASS
T.2	Thermal Test	72±2°C and −40±2°C, ≥6 h each extreme, ≤30 min transition, 10 cycles	PASS
T.3	Vibration	Per UN38.3 sinusoidal vibration profile	PASS
T.4	Shock	Per UN38.3 half-sine shock pulse requirements	PASS
T.5	External Short Circuit	Per UN38.3 short circuit at elevated temperature	PASS
T.6	Impact / Crush	Tested at 50% of design rated capacity	PASS
T.7	Overcharge	Using previously cycled undamaged batteries from T1–T5	PASS
T.8	Forced Discharge	Tested in fully discharged state	PASS

For Test T.1 (Altitude Simulation), the requirement specifies no leakage, no venting, no disassembly, no rupture, and no fire. Additionally, the open-circuit voltage of each cell or battery after testing must be not less than 90% of its voltage immediately prior to the test (this voltage requirement does not apply to fully discharged samples). All samples passed.

Standards & Compliance

The ETENWOLF X5PRO battery pack was tested against the following international transport safety 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 with Amendment, Section 38.3	Lithium metal and lithium-ion cells and batteries — safe transport qualification testing

UN38.3 is the mandatory certification framework required by international aviation authorities, including IATA DGR (Dangerous Goods Regulations), for any lithium battery transported by air. The standard mandates a sequence of eight tests (T.1 through T.8) designed to simulate and assess the hazards a battery may encounter during air transport, including low pressure, temperature extremes, vibration, mechanical shock, short circuit, impact, overcharge, and forced discharge.

The testing procedure sequence follows Clause 38.3.4 of the standard:

Tests T.1 through T.5 are conducted in sequence on the same cell or battery pack.
Tests T.6 and T.8 are conducted on cells or batteries not used in other tests.
Test T.7 uses undamaged batteries previously used in Tests T.1 to T.5.

All eight test procedures were completed with a PASS verdict, confirming that the X5PRO battery pack meets the full requirements of UN38.3 for air transport classification.

Validity & Certification Body

Issuing Laboratory

Field	Detail
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
Website	www.waltek.com.cn
Telephone	+86-769-2267 6998
Fax	+86-769-2267 6828
Email	[email protected]

Report Signatories

Role	Name
Tested By	Jason Zhen (甄锦炎)
Reviewed By	Jack Chen (陈咏松)
Approved By	Deval Qin (秦林伟)

Report Validity Notes

This report was issued under internal procedure reference WT-510-201-02-B. The following conditions govern its validity and use:

The test results apply solely to the specific samples submitted for testing and do not extend to other units or batches.
The report may not be partially reproduced without prior written permission from Waltek Testing Group Co., Ltd.
The report is invalid if altered, supplemented, or if it lacks the approver’s signature or the laboratory’s official accreditation stamp.
If the report does not bear the accreditation recognised seal, it may only be used for scientific research, education, or internal quality control purposes and may not be used as official supporting data for regulatory submissions.

Frequently Asked Questions

What is UN38.3 certification and why does the X5PRO need it?: UN38.3 is a mandatory international safety standard under the United Nations Recommendations on the Transport of Dangerous Goods. It specifies eight tests — altitude simulation, thermal cycling, vibration, shock, short circuit, impact, overcharge, and forced discharge — that lithium batteries must pass before they can be legally transported by air. The ETENWOLF X5PRO contains a 14.8V lithium polymer battery pack, so UN38.3 certification is required for IATA-compliant air freight and international shipping.
What are the key battery specifications of the X5PRO that were tested?: The X5PRO battery pack tested under report WTH25D12334288B has a rated voltage of 14.8V, a rated capacity of 1500mAh, and an energy rating of 22.2Wh. It uses four lithium polymer cells (model 503880) in a 4S1P configuration, with a maximum charge voltage of 16.8V and a discharge cut-off voltage of 12V. The complete unit weighs approximately 824.8g and measures 168.0mm × 114.7mm × 67.4mm.
Which laboratory conducted the UN38.3 tests for the X5PRO?: All tests were performed 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 based in Dongguan, Guangdong, China. Testing ran from 2025-12-16 to 2025-12-25, and the report was officially issued on 2026-01-14. The report was reviewed and approved by named signatories including Approved By Deval Qin (秦林伟).
Does the X5PRO battery pack pass all eight UN38.3 test procedures?: Yes. According to report WTH25D12334288B, the ETENWOLF X5PRO battery pack achieved a PASS verdict on all applicable UN38.3 test items T.1 through T.8, covering altitude simulation, thermal testing, vibration, mechanical shock, external short circuit, impact, overcharge, and forced discharge. The overall conclusion confirms that the submitted samples comply with ST/SG/AC.10/11/Rev.8 Section 38.3.