Document Overview
Key Findings The ETENWOLF HB3 hair dryer completed endurance cycling against the internal 10 H motor lifespan standard; all three samples met the minimum runtime threshold, but two of three units exhibited impeller-jamming faults after exceeding 10 H of accumulated operation. Product: HB3 Hair Dryer…
- Document type
- Test Report
- Prepared by
- Alex Newman
- Published
- Last reviewed
- Topics
- Mechanical Reliability
Key Findings
The ETENWOLF HB3 hair dryer completed endurance cycling against the internal 10 H motor lifespan standard; all three samples met the minimum runtime threshold, but two of three units exhibited impeller-jamming faults after exceeding 10 H of accumulated operation.
- Product: HB3 Hair Dryer (Needle-Grinding / 磨针 variant)
- Report No.: 2025052701
- Test Period: 2025-05-19 to 2025-06-05
- Sample Size: 3 pcs (C0519-7#, C0519-8#, C0519-9#)
- Standard: Internal Control Standard — minimum 10 H charge/discharge life
- Charge Time per Cycle: ~3 h 15 min; Discharge Time per Cycle: ~20 min
- Pass/Fail Verdict: For Reference Only (■ For Reference Only — functional anomalies observed in 2 of 3 samples)
- Root Cause: Motor abnormality causing impeller jam on power-on after extended runtime
Test Overview
| Field | Detail |
|---|---|
| Product No. / Name | Hair Dryer (Needle-Grinding variant) — HB3 |
| Model / Type Specification | HB3 |
| Report No. | 2025052701 |
| Test Date | 2025-05-19 to 2025-06-05 |
| Sample Quantity / No. | 3 PCS |
| Test Type | ■ Reliability Test (可靠性测试) |
| Test Standard | Internal Control Standard (内控标准) |
| Test Purpose | Evaluate the reliability of the HB3 hair dryer motor lifespan during actual charge/discharge use cycles |
| Manufacturer / Brand | ETENWOLF |
| Product URL | N/A |
Test Equipment & Setup
| Item | Detail |
|---|---|
| Test Equipment | Power Supply (电源) |
| Test Conditions — Temperature | 23 °C (Room Temperature) |
| Test Conditions — Humidity | 60 % RH (Room Humidity) |
| Lifespan Acceptance Threshold | 10 H cumulative charge/discharge operation (老化标准 10 H) |
| Charge Duration per Cycle | Approximately 3 hours 15 minutes |
| Discharge Duration per Cycle | Approximately 20 minutes |
| Acceptance Criterion | No functional failure — stable operation confirmed throughout |
Test Procedure
- Pre-Test: Verify sample appearance; confirm no cosmetic defects before testing begins. Record sample IDs (C0519-7#, C0519-8#, C0519-9#).
- Full Charge: Charge each sample to full capacity using the designated power supply. Each charge cycle takes approximately 3 hours 15 minutes.
- Discharge Cycle: Run each sample continuously under normal operating mode until battery is fully depleted. Each discharge cycle runs approximately 20 minutes.
- Repeat Cycles: Repeat the charge/discharge sequence until cumulative runtime reaches or exceeds the 10 H lifespan standard.
- Monitoring: Observe samples during operation for any functional anomaly, abnormal noise, impeller behavior, or power-on failures. Record total elapsed runtime per sample.
- Post-Test Inspection: After completing all cycles, inspect each sample for: (1) cosmetic/appearance changes; (2) charge and discharge function; (3) power-on behavior and airflow performance.
- Acceptance Criterion: Samples must complete ≥ 10 H of cumulative operation with no functional failure. Any impeller jam, startup failure, or motor anomaly constitutes a failure event.
Test Data & Results
| Sample ID | Test Duration (Hours) | Post-Test Observations |
|---|---|---|
| C0519-7# | 14 | 1. Appearance: No abnormality observed. 2. Battery charge/discharge function normal; charge time approx. 3 h 15 min, discharge time approx. 20 min. 3. After 14 hours of cumulative operation, functional anomaly detected: impeller jam on power-on (开机卡风叶). |
| C0519-8# | 14 | 1. Appearance: No abnormality observed. 2. Battery charge/discharge function normal; charge time approx. 3 h 15 min, discharge time approx. 20 min. 3. After 14 hours of cumulative operation, function remains stable; power-on normal (开机正常). |
| C0519-9# | 10.5 | 1. Appearance: No abnormality observed. 2. Battery charge/discharge function normal; charge time approx. 3 h 15 min, discharge time approx. 20 min. 3. After 10.5 hours of cumulative operation, functional anomaly detected: impeller jam on power-on (开机卡风叶). |
Test Picture Labels (from report):
| Photo Label | Description |
|---|---|
| 测试中 (During Test) | Unit under active charge/discharge cycling |
| 充电 (Charging) | Sample connected to power supply during charge phase |
| 测试后, 开机卡风叶 (Post-Test — Impeller Jam) | Sample fails to spin freely on power-on after extended runtime; impeller jamming confirmed |
| 测试后, 风压正常 (Post-Test — Airflow Normal) | Sample (C0519-8#) powers on normally with normal air pressure output after 14 H |
Overall Test Result Summary: All three HB3 samples reached the 10 H aging/lifespan standard. However, 2 out of 3 samples (C0519-7# and C0519-9#) exhibited functional anomalies during discharge cycles after exceeding 10 H — specifically impeller jamming on power-on. This was confirmed to be caused by motor abnormality. Sample C0519-8# completed 14 H without any functional failure.
Conclusion
| Item | Detail |
|---|---|
| Test Standard / Criterion | Internal Control Standard — cumulative runtime ≥ 10 H, no functional failure |
| Test Conditions | Room temperature 23 °C, 60 % RH; charge ~3 h 15 min per cycle, discharge ~20 min per cycle |
| Samples Tested | 3 PCS — C0519-7#, C0519-8#, C0519-9# |
| Result | All 3 samples met the minimum 10 H threshold. 2 of 3 samples (C0519-7# at 14 H, C0519-9# at 10.5 H) developed impeller-jam faults attributed to motor abnormality. 1 of 3 samples (C0519-8#) operated normally through 14 H. |
| Verdict | ■ For Reference Only (供参考) — functional anomalies observed; motor reliability improvement recommended before mass production sign-off |
Document Information
| Role | Name (Pinyin) | Date |
|---|---|---|
| Tested By (测试/日期) | Li Guanghua | 2025-06-05 |
| Checked By (审核/日期) | Zhang Ronggui | 2025-06-05 |
| Approved By (核准/日期) | Mai Shaoqiang | 2025-06-05 |
| Form No. | BTK-R-Q142/AO | |
Frequently Asked Questions
Did the ETENWOLF HB3 hair dryer pass the 10-hour motor lifespan test?
All three HB3 samples completed at least 10 hours of cumulative charge/discharge operation, meeting the minimum runtime threshold of the internal lifespan standard. However, 2 of 3 units developed impeller-jamming faults after exceeding 10 H, which were traced to motor abnormality. The overall verdict is “For Reference Only,” meaning the results flag a reliability concern rather than confirming a full production pass.
What does “impeller jam on power-on” mean for the HB3 hair dryer?
After extended runtime, two samples (C0519-7# and C0519-9#) failed to spin their fan blades freely when powered on — a condition called impeller jamming (开机卡风叶 in Chinese). Testing confirmed this was caused by internal motor degradation rather than a physical obstruction. The unit may power on but produce little or no airflow as a result.
How long does one charge/discharge cycle take for the HB3?
Each full charge cycle takes approximately 3 hours and 15 minutes. Each discharge cycle (running the dryer until the battery is depleted) takes approximately 20 minutes. The 10 H lifespan standard therefore requires multiple repeated charge/discharge cycles over the test period.
What test conditions were used for the HB3 motor lifespan evaluation?
The test was conducted at room temperature (23 °C) and 60 % relative humidity, using a standard power supply. Samples were cycled continuously between full charge and full discharge. The acceptance criterion required no functional failure across at least 10 cumulative hours of operation.
Related Products
Explore other ETENWOLF hair dryer and personal care models tested under the same reliability protocols:
- ETENWOLF Official Product Catalog — full range of hair dryers and inflation tools
- HB2 Hair Dryer — sibling model tested on the same lifespan sheet (HB2-成品寿命测试); see the HB2 endurance report for comparative motor reliability data
- ETENWOLF Inflation Tools Product Line — related consumer electronics tested under the same internal control standards