A car battery rated 45 A H is charged with a charger whose rating is 2.5A. How long will it take to charge the battery full?

A. 10 hrs
B. 18 hrs
C. 20 hrs
D. 25 hrs

Correct Answer:

Option B – 18 hrs

Explanation

For a car battery rated 45 AH, being charged by a charger of 2.5 A rating, the time for the battery to be fully charged is given by:
T = (45)/2.5 = 18 hrs