ETENWOLF FL1 Kids Rechargeable Flashlight Discharge Temperature Rise Data Report (放电温升数据)

Document Overview

Key Findings The FL1 Children’s Rechargeable Flashlight discharge temperature-rise test recorded peak component temperatures up to 80.12°C, with all measurement points monitored continuously across two sample units over 3,867 scan cycles from approximately 2025-06-08. Peak temperature recorded: 80.12°C (Red LED, Sample 10#) Ambient temperature range:…

Document type

Test Report

Prepared by

Ryan Cooper

Published

July 21, 2026

Last reviewed

July 21, 2026

Topics

Environmental Testing

Key Findings

The FL1 Children’s Rechargeable Flashlight discharge temperature-rise test recorded peak component temperatures up to 80.12°C, with all measurement points monitored continuously across two sample units over 3,867 scan cycles from approximately 2025-06-08.

• Peak temperature recorded: 80.12°C (Red LED, Sample 10#)
• Ambient temperature range: ~28.6°C – 30.6°C throughout test
• Samples tested: 2 units (10# and 12#)
• Total scan cycles: 3,867
• Measurement points per sample: Metal base, White LED, Yellow LED, Red LED, Green LED, Battery, U1, U2, U3, U4
• Test instrument: Keysight DAQ970A Data Acquisition System (S/N: MY58035717)
• Test start time (Excel serial): 45816.33288 | Stop time: 45816.55661

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-test: Samples (10# and 12#) placed in ambient environment; thermocouples/sensors attached to all measurement points (Metal Base, White LED, Yellow LED, Red LED, Green LED, Battery, U1–U4) on each unit.
2. Pre-test soak: Allow samples to reach thermal equilibrium with ambient; initial scan values confirmed near ambient (~32°C) at cycles 1–2.
3. Instrument connection: DAQ970A connected via USB (address USB0::0x2A8D::0x5101::MY58035717::0::INSTR); firmware version confirmed.
4. Test initiation: Flashlight units switched to operating (discharge) mode; data logging started simultaneously.
5. Data acquisition: System scans all channels continuously at approximately 5-second intervals, recording ambient temperature plus 10 component temperatures per sample per cycle.
6. Test duration: Logging continued for 3,867 cycles until temperatures stabilized and the test was stopped (data logging stopped flag triggered at end).
7. Post-test: Units powered off; final temperature readings captured; equipment disconnected.
8. Acceptance criteria: Maximum component temperatures recorded and compared against applicable product safety limits; temperature rise (ΔT = peak temperature − initial ambient) evaluated for each measurement point.

Test Data & Results

The table below presents the maximum temperature recorded at each measurement point (from the “最高温度” / Maximum Temperature row in the raw data), alongside the starting ambient temperature and initial component temperatures at scan 1.

The following table presents a representative selection of scan data rows spanning the full test duration. The complete dataset contains 3,867 scan records; key milestones (scans 1, 50, 100, 250, 500, 1000, 1500, 2000, 2500, 3000, 3500, 3867) are shown below to illustrate thermal progression.

Observations: Both samples exhibited similar temperature-rise profiles. The highest temperatures were observed at the Red LED position for both samples (Sample 10#: 80.12°C; Sample 12#: 79.82°C). The U1 point on Sample 10# reached 78.38°C, the highest among IC components. Temperatures stabilized after approximately 400–500 scan cycles and remained within ±2°C of peak values through the remainder of the discharge cycle. The ambient temperature remained stable throughout the test (28.6°C–30.6°C). At the end of the test (approximately scan 3,789 onward), a rapid temperature drop is observed consistent with the product being powered off or the discharge cycle ending.

Conclusion

Document Information

Frequently Asked Questions

What does the discharge temperature rise test measure?

The discharge temperature rise test measures how hot various components of the FL1 flashlight get during normal battery discharge operation. Thermocouples or RTD sensors are attached to key points — including the LED modules, battery, metal housing, and control ICs — and temperatures are logged continuously from startup until thermal stabilization (or end of discharge). This data is used to verify that no component exceeds safe operating temperature limits under worst-case use conditions.

What instrument was used and what does DAQ970A mean?

The Keysight DAQ970A is a professional data acquisition (DAQ) system used in electronics testing laboratories. It can scan multiple temperature sensor channels simultaneously at programmable intervals, storing timestamped readings. In this test, it recorded 21 temperature channels per scan cycle (1 ambient + 10 points on Sample 10# + 10 points on Sample 12#) approximately every 5 seconds over the full discharge duration.

Which component reached the highest temperature, and is it a concern?

The Red LED position on both samples reached the highest recorded temperature — approximately 80.12°C on Sample 10# and 79.82°C on Sample 12#. LED junctions naturally operate at elevated temperatures; whether this value is acceptable depends on the thermal ratings of the specific LED component used and applicable product safety standards. The battery temperatures (~62°C peak) and IC temperatures (~74–78°C) are also relevant for compliance evaluation against standards such as IEC 62368-1 or relevant children’s product regulations.

Why does the temperature drop sharply near the end of the dataset?

Starting around scan cycle 3,789 (approximately row 3,800 in the dataset), all component temperatures drop rapidly toward ambient. This indicates the flashlight was powered off — either because the battery was fully discharged, the test was manually stopped, or a protection circuit triggered. The subsequent cool-down curve confirms normal thermal recovery behavior after load removal.

Related Products

• ETENWOLF FL1 Kids Rechargeable Flashlight — Product Page
• Sibling test report (same Excel workbook): 温升报告 (Temperature Rise Report) — Sheet 1 of 2, FL1 Flashlight