How Many Amps Are in a 9-Volt Battery?
At 8 milliamperes, nine-volt batteries generate 400–500 milliampere-hours. While amperes measure electric current, ampere-hours are a measurement of battery capacity. A battery’s ability to produce electric current for an hour without running out of energy is measured in amperes. A 9-volt battery should last an hour if it is delivering 400 to 500 milliamperes (mAh), …