Duracell special application batteries offer reliable, long-lasting power youve come to expect from Duracell. And you can be assured its a battery you can trust since Duracell is the No.1 trusted brand of pharmacists and medical and office professionals. Features Duralock power preserve. Lasts longer in recorders, calculators and high-drain machines. Provides advanced performance in your everyday devices such as clocks, radios, smoke alarms, flashlights and remote controls.