Document Overview
Key Findings After 72 hours of extreme-temperature cycling storage (60 °C / 80 % RH and −20 °C), all three ETENWOLF FL1 Kids Rechargeable Flashlight samples retained full lighting function with no appearance defects, no switch anomalies, and no lens embrittlement or cracking — result…
- Document type
- Certification Report
- Prepared by
- Ryan Cooper
- Published
- Last reviewed
- Topics
- Environmental Testing
Key Findings
After 72 hours of extreme-temperature cycling storage (60 °C / 80 % RH and −20 °C), all three ETENWOLF FL1 Kids Rechargeable Flashlight samples retained full lighting function with no appearance defects, no switch anomalies, and no lens embrittlement or cracking — result recorded as Reference.
- Product: FL1 Kids Rechargeable Flashlight (FL1-儿童手电筒)
- Manufacturer: BTK
- Sample Quantity: 3 pcs
- High-Temperature Stage: 60 °C, 80 % RH, 2 h
- Low-Temperature Stage: −20 °C, 2 h
- Total Storage Duration: 72 h
- Lab Environment: 24 °C, 45 % RH
- Verdict: Reference (参考)
Test Overview
| Field | Detail |
|---|---|
| Test Type | Thermal Shock / High-Low Temperature Cycling (冷热冲击测试) |
| Report Number | 2025060901 |
| Test Date | 2025-06-06 to 2025-06-09 |
| Page | 1 |
| Product Name | ETENWOLF FL1 Kids Rechargeable Flashlight (FL1-儿童手电筒) |
| Model | FL1 |
| Manufacturer | BTK |
| Surface Treatment | / |
| Sample Quantity | 3 pcs |
| Test Reason | New Product (■新产品) |
| Test Purpose | Evaluate the durability of samples stored under extreme temperature environments (评估样品在极端温度的环境下储存的耐久性) |
| Laboratory Environment | Temperature: 24 °C; Humidity: 45 % RH |
Test Equipment & Setup
| Item | Detail |
|---|---|
| Instrument Name | Constant Temperature and Humidity Testing Machine (恒温恒湿试验机) |
| High-Temperature Condition (2.1) | 60 °C, Humidity 80 % RH, duration 2 h |
| Low-Temperature Condition (2.2) | −20 °C, duration 2 h |
| Total Storage Duration (2.3) | 72 h |
| Post-Storage Functional Test (2.4) | Lighting function verification |
| Test Class / Level | — (not specified) |
| Acceptance Requirement (3) | Sample illumination brightness normal; performance stable (样品照明亮度正常，性能稳定) |
Test Procedure
- Pre-Test: Record ambient laboratory conditions — temperature 24 °C, humidity 45 % RH. Confirm sample quantity: 3 pcs FL1 flashlights. Verify appearance baseline (no pre-existing cracks, deformation, or surface defects).
- Stage 1 — High-Temperature Exposure: Place samples in the constant-temperature and humidity chamber. Set to 60 °C / 80 % RH. Maintain for 2 hours.
- Stage 2 — Low-Temperature Exposure: Transition samples to low-temperature condition. Set to −20 °C. Maintain for 2 hours.
- Cycling Storage: Continue combined high/low temperature cycling storage for a total accumulated duration of 72 hours.
- Post-Test Functional Check: Remove samples and return to lab ambient conditions. Inspect appearance for abnormalities. Operate the switch and verify contact sensitivity. Activate illumination and confirm normal light output. Verify charging function operates normally. Inspect lens/light cover for embrittlement or cracking.
- Acceptance Criteria: Sample illumination brightness must be normal; overall performance must remain stable. Any cracking, embrittlement of the lens, charging failure, or switch malfunction constitutes a fail.
Test Data & Results
| Observation Item | Result |
|---|---|
| Illumination after storage (储存后，照明正常) | Normal |
| Charging function after storage (充电正常) | Normal |
| Lens cover — no embrittlement or cracking (灯罩无脆化或裂纹) | No embrittlement / No cracking |
Overall Test Result Statement: After 72 hours of extreme-environment storage, all samples showed no appearance abnormalities. Switch button contact was sensitive and responsive. Illumination output was normal. No functional failures were observed. (测试结果：样品72小时极端环境储存后，外观无异常，开关按键接触灵敏，照明光线正常，功能无失效)
Conclusion
| Field | Detail |
|---|---|
| Test Item | Thermal Shock — High/Low Temperature Cycling Storage |
| Conditions | High: 60 °C / 80 % RH / 2 h; Low: −20 °C / 2 h; Total: 72 h storage |
| Samples Tested | 3 pcs FL1 Kids Rechargeable Flashlight |
| Acceptance Requirement | Normal illumination brightness; stable performance |
| Result Summary | No appearance defects, normal switch response, normal illumination, normal charging, no lens embrittlement or cracking |
| Verdict | Reference (参考) — ■ Reference / □ Pass / □ Fail |
Document Information
| Role | Name (Pinyin) |
|---|---|
| Approval (核准) | Mai Shaoqiang |
| Review (审查) | Zhang Ronggui |
| Tester (试验人) | Li Guanghua |
| Form Number (表单编号) | BTK-R-Q-087A/1 |
Frequently Asked Questions
What does the thermal shock test for the ETENWOLF FL1 flashlight involve?
The thermal shock test exposes the FL1 Kids Rechargeable Flashlight to alternating extreme temperatures — 60 °C at 80 % relative humidity for 2 hours, followed by −20 °C for 2 hours — over a total storage period of 72 hours. After cycling, samples are inspected for appearance defects and tested for illumination output, charging function, and lens integrity.
Did the ETENWOLF FL1 flashlight pass the high-low temperature cycling test?
All three FL1 samples completed 72 hours of extreme-temperature storage with no appearance abnormalities, no switch failures, normal illumination output, normal charging performance, and no lens embrittlement or cracking. The result was recorded as Reference (参考), meaning the data is logged for product development benchmarking rather than a formal pass/fail certification verdict.
What is the difference between a Pass and a Reference verdict in this test report?
A Pass verdict confirms the product meets a defined compliance standard. A Reference verdict means the test data is recorded as a performance reference point — typically used for new product baseline documentation where no mandatory specification threshold is being formally certified. In this FL1 report, all observed results were normal, and the Reference designation reflects the new-product evaluation context.
What temperatures can the ETENWOLF FL1 Kids Flashlight withstand in storage?
Based on this thermal shock test, the FL1 flashlight maintained full functional integrity after storage at temperatures ranging from −20 °C (low extreme) to 60 °C with 80 % relative humidity (high extreme) across a 72-hour test cycle. No functional failures or physical damage were recorded at either temperature extreme.