1. Good performance: no electrolyte leakage, no battery expansion and rupture under normal use. 

2. Good discharge performance: stable discharge voltage and flat discharge platform. 

3. Good vibration resistance: the fully charged battery is completely fixed, vibrates for 1 hour with an amplitude of 4mm and a frequency of 16.7Hz, no leakage, no battery  expansion and rupture, and the open circuit voltage is normal. 

4. Good impact resistance: The battery in the fully charged state falls naturally from a height of 20cm to a hardboard with a thickness of 1cm for 3 times. There is no leakage, no battery swelling and rupture, and the open circuit voltage is normal. 

5. Good resistance to overdischarge: 25 degrees Celsius, the battery in the fully charged state is discharged with constant resistance for 3 weeks (the resistance value is equivalent to the resistance required by the battery's 1CA discharge), and the recovery capacity is above 75. 

6. Good overcharge resistance: 25 degrees Celsius, fully charged battery 0.1CA charge for 48 hours, no leakage, no battery expansion and rupture, normal open circuit voltage, capacity maintenance rate above 95. 

7. Good resistance to high current: the fully charged battery is discharged at 2CA for 5 minutes or 10CA for 5 seconds. No conductive parts are blown, and there is no appearance deformation.