Always keep extra batteries on hand. Energizer is a leader in the industry in powering people's lives responsibly. World's 1st Zero Mercury C Alkaline Battery. Package of batteries. Years Long Shelf Life - Stock Up and Save Energizer Max batteries provide long-lasting dependable power for your everyday devices. Energizer MAX is the perfect alkaline battery when you need power that lastsCand performance you can count on. A flashlight to lead the way. A smoke detector to alert you. Or simply a radio to play your favorite song. Also ideal for games and toys clocks and much more.