These Allmax MAXD2 Alkaline Maximum Power Batteries D2 LR20 1.5V 2 Pack are compatible devices such as Flashlights, toys, candles, motion detectors, Christmas decorations, lanterns, camping lanterns, boom boxes, smoke alarms, clocks, baby swings, camera flashes, digital cameras, air pumps, baby rockers, remotes, outdoor motion activated lights, portable stereos, megaphones, Geiger counters, electric motors, smoke detectors, door chimes, air mattresses, and portable CD players.