50mA for a standard Alkaline 9v battery with 100mA surge. But, an Energizer Ultimate Lithium battery can have sustained output of 1A = 9W.
It also has almost no internal leakage current so, with a proper off-switch, the battery has a 10+ year shelf-life. The cylinder shaped Ultimate lithium batteries have a 20+ year shelf life.
It also has almost no internal leakage current so, with a proper off-switch, the battery has a 10+ year shelf-life. The cylinder shaped Ultimate lithium batteries have a 20+ year shelf life.