Eveready 392BP Energizer ZEROMERCURY Silver oxide Battery, Pack, Nominal Voltage: 1.55 V, 44 MILAMP-HR, Discharge Cut-Off Voltage: 1.2 V At 21 DEG C, Electrolyte: Silver Oxide, Internal Impedance: 15 - 40 OHM At 40 HZ, Positive Terminal: Bottom/Sides, Negative Terminal: Top, Size: SR41, 7.9 MM Lengt