Long-life alkaline 9-volt batteries provide great power Recommended for use in a variety of machines. Works great in smoke alarms, flashlights, lanterns, calculators, pagers, cameras, recorders, radios, CD players, medical equipment, toys and electronic games. Duralock Power Preserve (TM) Technology helps ensure batteries remain dependable for up to 10 years in storage. Duracell (R) Coppertop 9-Volt Alkaline Batteries, Pack Of 12 is one of many 9-Volt Alkaline Batteries available through Office Depot. Made by Duracell.