After the first hour a nickel-cadmium (Ni-Cad) battery is under test, how often should you monitor the individual cells?

After the first hour a nickel-cadmium (Ni-Cad) battery is under test, how often should you monitor the individual cells? 




a. 10-minute intervals.
b. 15-minute intervals.
c. 20-minute intervals.
d. 25-minute intervals



Answer: B