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. . | Duracell with duraLock power preserve technology | Alkaline, mercury free | 5 mm x 12 mm x 12 mm | 105 mAh