The Eveready Super Heavy Duty 9V will fulfill your family's basic power needs. These batteriesoffer you reliable, consistent, and long-lasting performance. It is an ideal solution for basic and every day devices in your house. When your device is not in use and stored away, these super, heavy-duty batteries will last you up to three years. If other heavy-duty batteries have failed you before, this battery will exceed your expectations of working flawlessly to power up your electronic devices. If you are in search for quality batteries, do not look further than these batteries. Perfect for low drain devices such as flashlights, radios, clocks, smoke detectors, cassette players, and calculators