UL2272测试哪些项目：
1. Overcharge Test(过充测试)
2. Short Circuit Test(短路测试)
3. Overdischarge Test(过放测试)
4. Temperature Test(正常温升测试)
5. Imbalanced Charging Test(充电失衡测试)
6. Vibration Test (振动测试)
7. Shock Test (冲击测试)
8. Crush Test (挤压测试)
9. Drop Test (跌落测试)
10. Mold Stress Relief Test(烤箱测试)
11. Motor Overload Test(马达过载测试)
12. Motor Locked Rotor(锁马达测试)
13. Water Exposure Tests-IPX4 Code Rating (IPX4 测试)
14. Water Exposure Tests- Partial immersion (浸渍试验)
15. Thermal Cycling Test(热循环测试)
16.L abel Permanence Test(标签耐久性测试)