How Much Current Can A 9v Battery Supply. A typical 9V battery can provide 600mAh milliamp hours which means it will provide 600 milliamps for 1 hour before its dead you draw more you deplete the battery faster 12amps it will be dead in about half an hour I think you have a voltage and current issue a 9 volt battery is just not enough to put out what you want. I 9 V 1 Ω.
The typical transistor radio 9 Volt Battery is in a PP3 package. Ad Affordable Prices Broad Selection Freshness Guaranteed. Even if it entered the body a 9 volt.
So over the runtime of 1h a 9V block battery can provide less than 3W while any halfway decent USB supply can give you 10W or more.
It works but im constantly replacing the battery. Small 9 volt batteries are designed to power smoke alarms for a couple of years but wont supply 150ma for even a day. So over the runtime of 1h a 9V block battery can provide less than 3W while any halfway decent USB supply can give you 10W or more. Looking at a second case and supposing that the 9 volt battery had an internal resistance of 05 ohms the current it could output into a zero ohm short would be 18 amperes.
