What does it mean that the Helios J1 passed ANSI/CAN/UL 2743:2023?

Passing ANSI/CAN/UL 2743:2023 means the ETENWOLF Helios J1 has been independently verified to meet the North American safety standard for portable power packs and automotive jump starters. Testing covered electrical hazards (short circuit, reverse polarity, overcharging), mechanical hazards (drop, impact, vibration), and thermal stress, confirming the device operates safely under both normal and abnormal conditions.

Who conducted the UL 2743 testing for the Helios J1, and is the lab credible?

Testing was conducted by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory in Dongguan, Guangdong, China. The report was compiled by Lucas Cao (Project Engineer) and approved by Sam Qi (Designated Reviewer) following a formal internal approval process.

What is the battery capacity and peak current of the Helios J1?

The Helios J1 has a battery capacity of 59.2 Wh, a start current of 240 A, and a peak current of 800 A. The battery uses a 4S1P cell configuration. Total unit weight is approximately 0.79 kg, plus 0.24 kg for the booster cable.

Can the USB-A and Type-C ports on the Helios J1 be used at the same time?

No. According to the product specifications in report WTH25D05119733R1S001, the USB-A and Type-C ports cannot be operated simultaneously. Only one output port may be loaded at a time. The Type-C port supports both input and output, while the USB-A port is output-only.

ETENWOLF Helios J1 Portable Automotive Jump Starter — UL 2743 Test Report (WTH25D05119733R1S001)

Document Overview

Document Overview This page presents the official UL 2743 test report issued for the ETENWOLF Helios J1 Portable Automotive Jump Starter. The report was prepared by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory located at No. 77, Houjie Section, Guantai Road, Houjie…

Document type: Certification Report
Prepared by: Michelle Torres
Published: July 22, 2026
Last reviewed: July 22, 2026
Topics: North America: FCC / UL

Document Overview

This page presents the official UL 2743 test report issued for the ETENWOLF Helios J1 Portable Automotive Jump Starter. The report was prepared by Waltek Testing Group Co., Ltd., an accredited third-party testing laboratory located at No. 77, Houjie Section, Guantai Road, Houjie Town, Dongguan City, Guangdong, China.

Reference Number: WTH25D05119733R1S001
Document Type: Test Report
Applicable Standard: ANSI/CAN/UL 2743:2023
Date of Sample Receipt: 2025-05-14
Date of Testing: 2025-05-14 to 2025-05-27
Date of Issue: 2025-06-25
Overall Test Result: PASS
Applicant / Manufacturer: Guangdong Bestek Technology Co., LTD, No. 1, North Gaopu 8th Road, Yuancheng Industrial Park, Heyuan City, Guangdong, P.R. China

This report supersedes original report WTH25D05119733S001 (dated 2025-05-30). The revision (R1, dated 2025-06-25) was issued solely to update the product name and model designation; no additional testing was required following the review.

Product Information

The ETENWOLF Helios J1 is a compact, portable power pack designed to jump-start automotive vehicles. It combines a high-current jump-start output with multi-protocol USB charging ports and integrated LED flashlights, making it a versatile roadside emergency tool.

Attribute	Detail
Product Category	Portable Automotive Jump Starter
Brand / Model	ETENWOLF Helios J1
Trade Mark	None declared
Battery Capacity	59.2 Wh
Cell Configuration	4 cells in series (4S1P)
Start Current	240 A
Peak Current	800 A
Type-C Input / Output	5 V DC / 3 A, 9 V DC / 3 A, 12 V DC / 2.5 A, 15 V DC / 2 A, 20 V DC / 1.5 A
USB-A Output	5 V DC / 3 A, 9 V DC / 2 A, 12 V DC / 1.5 A
Operating Temperature	0 °C to 40 °C
Equipment Mobility	Portable
Operating Condition	Continuous
Mass	Approx. 0.79 kg + 0.24 kg (booster cable)
Ports	1× Type-C (input/output), 1× USB-A (output), 1× jump-start output, 2× LED flashlight

Note: The USB-A and Type-C ports cannot be loaded simultaneously.

Key Details

All applicable test clauses under ANSI/CAN/UL 2743:2023 were performed at Waltek’s Dongguan facility. The table below summarises each tested clause, the method applied, and the verdict.

Clause	Test Name	Method / Condition	Result	Verdict
42	Power Input Test	Per standard appended table	Compliant	Pass
43	Normal Charging Operation Test	Per standard appended table	Compliant	Pass
47	Normal Temperature Test	Maximum normal load; power pack ampacity temperature test	Compliant	Pass
50.2	Output Connections Short Circuit Test	Per standard appended table	Compliant	Pass
50.3	Reverse Polarity of Booster Cables	Booster cable connections reverse-connected to a fully charged battery	Internal protection opens; sample complies with Clause 50.1.1	Pass
50.4	Component Faults	Per standard appended table	Compliant	Pass
50.9	Overcharging Test	Per standard appended table	Compliant	Pass
51	Vibration Test	4 hours at 22 cycles/second, 1/4 inch (6.4 mm) displacement, vertical plane	No catch fire or explosion; complies with Clause 50.1.1	Pass
55.2	Impact Test	Steel sphere dropped from 1.30 m height	Test probe cannot contact hazardous live parts; no fire, no explosion	Pass
55.3	Drop Test	Sample dropped 3 times from 0.9 m height	Test probe cannot contact hazardous live parts; no fire, no explosion	Pass
56	Mold Stress Test	Conditioned in oven at 70 °C for 7 hours	No distortion, deterioration, shrinkage, warping, or softening that would expose live parts	Pass
65	Power Pack Ampacity Test	Per standard	Compliant	Pass
67	Cold Bend Test	Per standard	Compliant	Pass
68	Clamp Tests	Per standard	Compliant	Pass

Clauses deemed not applicable (N/A) include: Clause 44 (Lithium Charging System Test), Clause 45 (Capacitor Discharge Test), Clause 46 (Leakage Current Test), Clause 48 (Dielectric Voltage Withstand Test), Clause 50.5 (Relay and Solenoid Burnout — approved relay used), Clause 50.7 (Disconnected Fan Test — no fan), Clause 50.8 (Blocked Ventilation Test — no ventilation), Clause 50.10 (Internal Battery Reverse Polarity — construction prevents reverse connection), Clause 50.11 (Thermal Propagation Test), and Clause 54 (Strain Relief — detachable power cord used).

Standards & Compliance

The ETENWOLF Helios J1 was tested against the following standard:

ANSI/CAN/UL 2743:2023 — Standard for Portable Power Packs. This is the primary North American safety standard covering portable automotive jump starters and power packs, addressing electrical, mechanical, thermal, and abnormal-operation hazards.

Key test disciplines covered under this standard and applied to the Helios J1 include:

Electrical performance: power input, normal charging, short-circuit output, overcharging, and reverse-polarity protection.
Thermal safety: normal temperature test, mold stress test, and cold bend test.
Mechanical safety: vibration, impact, and drop tests to verify enclosure integrity and absence of exposed live parts.
Clamp and ampacity: booster cable clamp tests and power pack ampacity verification to confirm safe current-carrying capacity.

All subcontracting decisions for test items were confirmed as none — all tests were conducted entirely at the Waltek Dongguan facility.

Validity & Certification Body

Issuing Laboratory: Waltek Testing Group Co., Ltd.
Website: www.waltek.com.cn
Address: No. 77, Houjie Section, Guantai Road, Houjie Town, Dongguan City, Guangdong, China
Tel: +86-769-2267 6998 | Fax: +86-769-2267 6828

Compiled by: Lucas Cao, Project Engineer
Approved by: Sam Qi, Designated Reviewer
Original Report: WTH25D05119733S001, dated 2025-05-30
Revised Report: WTH25D05119733R1S001, dated 2025-06-25 (product name and model update; no re-testing required)
Total Pages: 12 pages + 3 pages photo documentation

This test report is valid only for the specific sample(s) tested. It may not be reproduced except in full, and only with prior written permission from Waltek Testing Group Co., Ltd. The report is invalid without the test institute’s official stamp and the signatures of both the compiler and the approver.

Frequently Asked Questions

Q: What does it mean that the Helios J1 passed ANSI/CAN/UL 2743:2023?: Passing ANSI/CAN/UL 2743:2023 means the ETENWOLF Helios J1 has been independently verified to meet the North American safety standard for portable power packs and automotive jump starters. The testing covered electrical hazards (short circuit, reverse polarity, overcharging), mechanical hazards (drop, impact, vibration), and thermal stress — confirming the device operates safely under both normal and abnormal conditions.
Q: Who conducted the UL 2743 testing for the Helios J1, and is the lab credible?: Testing was conducted by Waltek Testing Group Co., Ltd., a third-party testing laboratory based in Dongguan, Guangdong, China. Waltek is an accredited testing body that issues reports recognised for UL standard compliance. The report was compiled by a Project Engineer and reviewed by a Designated Reviewer, following a formal internal approval process.
Q: What is the battery capacity and peak current of the Helios J1?: The Helios J1 has a battery capacity of 59.2 Wh, a start current of 240 A, and a peak current of 800 A. The battery uses a 4S1P cell configuration (four cells in series, one cell in parallel). Total unit weight is approximately 0.79 kg, plus 0.24 kg for the booster cable.
Q: Can the USB-A and Type-C ports be used at the same time?: No. According to the product specifications documented in report WTH25D05119733R1S001, the USB-A and Type-C ports on the Helios J1 cannot be operated simultaneously. Only one output port may be loaded at a time. The Type-C port supports both input (charging the unit) and output (charging devices), while the USB-A port is output-only.