How to Determine the AH Capacity of a 12-Volt Battery N70ZZ4WD
- 1). Note the Reserve Minutes rating of the N70ZZ4WD battery, which is 170. Reserve minutes are how long a battery can provide 25 amps of current while holding its 12-volt rating.
- 2). Convert the 170 minutes of the Reserve Minutes to hours by dividing it by 60; 170 minutes is 2.83 hours.
- 3). Multiply the previous result by the 25 amps of the Reserve Minutes test to get the approximate amp-hour rating of the N70ZZ4WD. Twenty-five amps multiplied by 2.83 hours yields 70.8. This is the approximate AH capacity of the Century N70ZZ4WD Overlander battery.