File:Vintage Transistor Radio 9 Volt Batteries, Great Brand Names & Graphics - Eagle, Oriole, Pep Boys, Flying Bomb and Master Cell (8545729133).jpg - Wikimedia Commons
Hi Watt 6F22 9V General Purpose Long Life Zinc Carbon Battery For Transistor Radios
NHR 6F22-9V Long Life Battery for Transistor, Radios, Science Project-| KidsnKarts.com
Hi-Watt 6F22 9V Non-Rechargeable Long Life Battery, Battery Type: Zinc Carbon, Capacity: 600 Mah