Document Overview
Key Findings The CL3 camping lantern passed all drop test requirements after six free-fall drops from 100 cm onto a concrete surface, showing only minor surface scratches with no structural cracking, deformation, or functional defects. Product: CL3 Camping Lantern (CL3-露营灯) Report No.: 20260421-001 Test Date:…
- Document type
- Test Report
- Prepared by
- Ryan Cooper
- Published
- Last reviewed
- Topics
- Mechanical Reliability
Key Findings
The CL3 camping lantern passed all drop test requirements after six free-fall drops from 100 cm onto a concrete surface, showing only minor surface scratches with no structural cracking, deformation, or functional defects.
- Product: CL3 Camping Lantern (CL3-露营灯)
- Report No.: 20260421-001
- Test Date: 2026-04-21
- Drop Height: 100 cm
- Drop Faces: 6 orientations (front, back, left, right, top, bottom)
- Surface: Concrete floor, free-fall
- Samples: 2 PCS
- Verdict: Pass
Test Overview
| Field | Details |
|---|---|
| Test Type | Drop Test (跌落试验) — Mechanical Reliability |
| Standard / Test Basis | Engineering change verification (工程变更) |
| Report No. | 20260421-001 |
| Page | 1.0 |
| Date | 2026-04-21 |
| Product Name | CL3 Camping Lantern (CL3-露营灯) |
| Manufacturer | BTK |
| Surface Treatment | — |
| Sample Quantity | 2 PCS |
| Test Reason | Engineering Change (工程变更) ■ |
| Test Purpose | Evaluate the product’s resistance to drop impact and assess overall reliability |
| Lab Environment | Temperature: 22 °C; Humidity: 55% RH |
Test Equipment & Setup
| Item | Details |
|---|---|
| Instrument Name | Single-arm drop testing machine (单臂跌落试验机) |
| Ancillary Equipment | Power controller (电源控制器) |
| Drop Height | 100 cm |
| Drop Surface | Concrete floor |
| Drop Orientations | 6 faces — front (正面), back (背面), left side (左侧面), right side (右侧面), top (顶面), bottom (底面) |
| Drop Method | Free-fall from each orientation |
| Sample Weight | Recorded on test sheet (field present, value not specified in source data) |
| Test Class | Recorded on test sheet (field present, value not specified in source data) |
Test Procedure
- Pre-test inspection: Visually inspect both samples for any pre-existing damage; confirm power-on functionality and mode-switching operation; record sample weight and test class.
- Environment setup: Verify lab conditions — temperature 22 °C, humidity 55% RH.
- Equipment setup: Configure the single-arm drop testing machine to a drop height of 100 cm above a concrete surface.
- Drop 1 — Front face (正面): Position sample in front-face orientation; release for free-fall onto concrete.
- Drop 2 — Back face (背面): Reposition sample; release for free-fall.
- Drop 3 — Left side (左侧面): Reposition sample; release for free-fall.
- Drop 4 — Right side (右侧面): Reposition sample; release for free-fall.
- Drop 5 — Top face (顶面): Reposition sample; release for free-fall.
- Drop 6 — Bottom face (底面): Reposition sample; release for free-fall.
- Post-test inspection: Inspect housing for cracking, deformation, or structural damage; power on to verify illumination (no flicker); test mode/gear switching; verify charging function; check that all screws are secure.
- Acceptance criteria: Housing must show no cracking or breakage; main structural body must be free of defects; all functional features must operate normally after all six drops.
Test Data & Results
| Inspection Item | Observation After 6 Drops | Result |
|---|---|---|
| Lamp head cracking | No cracking on lamp head (灯头无开裂) | Pass |
| Lamp shade damage | No damage to lamp shade (灯罩无受损) | Pass |
| Power-on illumination | Lights immediately upon power-on, no flickering (通电即亮无频闪) | Pass |
| Screw retention | No screws loose (螺丝无松脱) | Pass |
| Charging function | Charging function normal (充电功能正常) | Pass |
| Housing / structural integrity | Only minor surface scratches present; no cracking or deformation of outer shell or main body structure | Pass |
| Mode / gear switching | Gear switching smooth and normal (档位切换顺畅) | Pass |
| Overall functional assessment | No functional defects detected (无功能性不良) | Pass |
Overall test result summary: After drop testing, only minor scratches were observed on the exterior. The structural body showed no cracking or deformation. The unit powered on normally, mode switching was smooth, and the charging function operated correctly. No functional defects were identified. The product is judged Qualified (合格).
Conclusion
| Field | Details |
|---|---|
| Result | ■ Pass (合格Pass) |
| Drop Standard | 6 free-fall drops from 100 cm onto concrete, covering all 6 face orientations |
| Acceptance Conditions | No housing cracking or breakage; main body structure defect-free; all functions normal post-drop |
| Samples Tested | 2 PCS — CL3 Camping Lantern |
| Manufacturer | BTK |
| Verdict | PASS |
Document Information
| Role | Name (Pinyin) |
|---|---|
| Approval (核准) | Mai Shaoqiang |
| Review / Check (审查) | Zhang Ronggui |
| Tester (测试) | Li Guanghua |
| Form Number (表单编号) | BTK-R-Q-087A/1 |
Frequently Asked Questions
What does the CL3 drop test evaluate?
The drop test evaluates the CL3 camping lantern’s ability to withstand mechanical shock from accidental drops. The unit is subjected to six free-fall drops from 100 cm onto a concrete surface — one drop for each face orientation (front, back, left, right, top, bottom) — and then inspected for structural damage and functional integrity.
What are the pass/fail criteria for this test?
The product passes if the housing shows no cracking or breakage, the main structural body is free of defects, and all functions (illumination, mode switching, charging) operate normally after all six drops. Minor cosmetic scratches are acceptable and do not constitute a failure.
Why was this test triggered as an engineering change verification?
The report indicates the test reason was an engineering change (工程变更) rather than a new product qualification or routine test. This means a design or manufacturing modification was made to the CL3, and the drop test was conducted to confirm the change did not negatively affect the unit’s mechanical reliability.
Who manufactured the CL3 camping lantern tested in this report?
The CL3 camping lantern tested in report 20260421-001 was manufactured by BTK. The test was conducted under lab conditions of 22 °C and 55% RH, with two production samples evaluated.
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For international drop test and mechanical reliability standards, refer to: