According which of the following statements can you determine that the battery is faulty? (Multiple Choice)
A . The voltage increase of a battery is faster than the other batteries.
B . The temperature of the battery string during discharge is 2 ℃ higher than the surrounding ambient temperature.
C . A battery suffers from obvious bulge and leakage.
D . The voltage drop of a battery is obviously faster than the other batteries.
Answer: ACD