The US-Military has bought damned-near all of their alkaline batteries from Rayovac, for at least 15 years. Unbranded green/black batteries gave way to the 'normal' Rayovac black/gold/red several years back, when someone figured out it was cheaper to get the 'industrial'-branded Rayovac's, and that batteries INSIDE a device really don't NEED to be green....
Off a Rayovac Maximum 9v battery from the New York State Army National Guard: "Guarantee: we will replace or repair, at our option, any device damaged by this battery if sent with batteries prepaid to us. Guarantee void if battery is recharged. Manuf. by/for Rayovac corp., Madison, WI 53711"