Help make Alexa smarter on Alexa Answers. Sign in with Amazon

Miscellaneous

# How many watts are in a nine volt battery?

**1 Answer**

Watts is not the correct way to measure battery capacity because it doesn’t consider how long the battery can produce those watts. Watt-hours is more pertinent: a typical alkaline 9 volt battery has 500 mAh at 100 mA discharge rate, or about 4.5 watt-hours of power.

LIVE

Points
20

Rating