The DieHard long lasting specialty batteries utilizes Silver Oxide with zero Mercury. DieHard's durable, reliable power delivers long-lasting power to your button-battery-operated devices. Replaces: AG5, 309, F, WS6, SP393, SR48, SR54, SR754W, SR754SW, SR754S, V393, 255, SB-B3, S15, 255, D393, 16/15, SR48W, S320/GP93, 93, 193/G5/SG5, 09/393, 526/546, DR754W (41-1292)