Eveready 357BP Energizer ZEROMERCURY Silver oxide Battery, Pack, Nominal Voltage: 1.55 V, 150 MILAMP-HR, Discharge Cut-Off Voltage: 1.2 V At 21 DEG C, Electrolyte: Silver Oxide, Internal Impedance: 5 - 15 OHM At 40 HZ, Positive Terminal: Bottom/Sides, Negative Terminal: Top, Size: SR44, 11.6 MM Leng