If you are looking for a battery that can power your electronic devices with ease and allow them to last longer, then the Eveready AAA-4 Super Heady Duty Batteries are all you need. As the name suggests, the batteries are designed to last long and provide undisrupted source of power for all your electronic devices. It allows electronic devices to last long and perform at their optimum level. The Super Heavy Duty batteries work best for 3 years from their manufacture date. The AAA batteries work best for devices like clocks, radio, torches, toys, remote controls etc.