problem

phenomenons

causative

responsibility

Over-discharge

The voltage lower than:2V battery 1.8V,6V battery 5.4V,12V battery 10.8V

The float voltage is lower than normal,after cycle use not fully charge

user

Over-charge

Case distortion,capacity lower than normal,voltage big difference in one group

The float voltage is higher than normal,no temperature compensation

user

Short-circuit

2V battery voltage is near 0V,12V battery voltage below 10V,6V battery voltage below 4V

Plate distortion,lead skim,separator damage,

manufacterer

Open-circuit

Voltage is 0V,can not discharge

Terminal broken

manufacterer

leakage

From the vent or terminal,cover

Case broken or sealed failure

Transportation、user or manufacterer

Case damage

Trace on case

Transportation,move,assembling

Checking course

Vent failure

Case distortion,cell dry up,voltage lower than normal

Vent damage

manufacterer

End of service life

Service  time exceed designed life ,battery can not discharge

The end of life of the battery

normal