Document Overview
Key Findings All three S7 tire inflator samples passed the shutdown static current test, measuring well below the 20 μA acceptance threshold with values ranging from 1.1 μA to 1.4 μA. Test type: Reliability Test — Shutdown Static Current Standard: Internal standard (<20 μA) Samples…
- Document type
- Test Report
- Prepared by
- Daniel Wright
- Published
- Last reviewed
- Topics
- Battery Testing
Key Findings
All three S7 tire inflator samples passed the shutdown static current test, measuring well below the 20 μA acceptance threshold with values ranging from 1.1 μA to 1.4 μA.
- Test type: Reliability Test — Shutdown Static Current
- Standard: Internal standard (<20 μA)
- Samples tested: 3 units (1#, 2#, 3#)
- Results: 1.4 μA, 1.1 μA, 1.4 μA
- Verdict: Pass (all values <20 μA)
- Test date: 2025-05-16
- Report No.: 2025051601
Test Overview
| Field | Details |
|---|---|
| Test Type | Shutdown Static Current Test (关机静态电流测试) |
| Test Category | Reliability Test (可靠性测试) |
| Test Standard | Internal Standard |
| Report No. | 2025051601 |
| Test Date | 2025-05-16 |
| Product No./Name | Tire Inflator (充气泵) |
| Model / Type Specification | S7 (Etenwolf Vortex S7 Tire Inflator) |
| Manufacturer | Etenwolf |
| Sample Quantity / No. | 3 PCS |
| Test Purpose | Measure the static current of the product in the powered-off state |
| Test Environment | Room Temperature: 23 °C, Relative Humidity: 60% |
Test Equipment & Setup
| Item | Details |
|---|---|
| Test Equipment | Multimeter (万用表) |
| Measurement Parameter | Static current (μA) in powered-off state |
| Acceptance Criterion | Less than 20 μA |
| Ambient Temperature | 23 °C |
| Relative Humidity | 60% |
| Device State During Test | Powered off (关机) |
Test Procedure
- Pre-test: Confirm samples (3 PCS, S7) are in the powered-off state and fully assembled.
- Environment check: Verify ambient conditions — temperature 23 °C, relative humidity 60%.
- Equipment setup: Configure multimeter to measure current in the μA range.
- Procedure: With the product in the powered-off (shutdown) state, connect the multimeter in series and record the static current for each sample.
- Data recording: Record current readings (μA) for samples 1#, 2#, and 3#.
- Post-test: Compare all measured values against the acceptance criterion of <20 μA.
- Acceptance criteria: All samples must measure less than 20 μA to pass.
Test Data & Results
| Sample No. (编号) | State (状态) | Current / μA (电流（μA）) |
|---|---|---|
| 1# | Powered Off (关机) | 1.4 |
| 2# | Powered Off (关机) | 1.1 |
| 3# | Powered Off (关机) | 1.4 |
Observations: All three samples measured significantly below the 20 μA threshold. The highest recorded value was 1.4 μA (samples 1# and 3#) and the lowest was 1.1 μA (sample 2#), representing a worst-case margin of more than 14× below the acceptance limit. No anomalies were noted during testing.
Conclusion
| Field | Details |
|---|---|
| Result | Pass ■合格 |
| Standard | Internal Standard — static current <20 μA |
| Test Conditions | Powered-off state; 23 °C, 60% RH |
| Samples | 3 PCS (1#, 2#, 3#) |
| Measured Values | 1.4 μA, 1.1 μA, 1.4 μA |
| Verdict | All samples PASS — values well within the <20 μA limit |
Document Information
| Role | Name (Pinyin) | Date |
|---|---|---|
| Tested By (测试/日期) | Li Guanghua | 2025-05-16 |
| Checked By (审核/日期) | Zhang Ronggui | 2025-05-16 |
| Approved By (核准/日期) | Mai Shaoqiang | 2025-05-16 |
| Report No. | 2025051601 | |
| Source File | S7关机静态电流测试 2025.5.16.xlsx | |
Frequently Asked Questions
What is shutdown static current and why does it matter?
Shutdown static current (also called standby or quiescent current) is the small amount of current a device draws from its battery even when powered off. For portable tools like tire inflators that use an internal battery, excessive static current leads to gradual self-discharge, shortening battery life and reducing product reliability. Keeping this value below 20 μA ensures the S7 retains its charge over long storage periods.
What acceptance threshold does the S7 use for this test?
The S7 uses an internal Etenwolf standard requiring the shutdown static current to be less than 20 μA. All three samples tested on 2025-05-16 passed comfortably, with measured values of 1.4 μA, 1.1 μA, and 1.4 μA — all more than 14 times below the limit.
What equipment is used to measure static current?
A multimeter configured to measure current in the microampere (μA) range is connected in series with the device under test while the product is in the powered-off state. The ambient environment is controlled at 23 °C and 60% relative humidity to ensure consistent, repeatable measurements.
How does this test relate to overall battery reliability?
This test is classified as a Reliability Test within Etenwolf’s quality process. Along with other battery-related assessments, it verifies that the S7’s power management circuit correctly cuts unnecessary current paths when the unit is switched off, contributing to a longer service life and better user experience over time.
Related Products
- Etenwolf Vortex S7 Tire Inflator — Product Page
- More test reports by Daniel Wright