5pc 6V Silver Oxide Battery S1325, 4SR44, S28PX, V28PX, PX28 This 4SR44 or PX28-S battery is a popular silver-oxide cell are commonly used in cameras (such as the Minox 35ML, Bronica GS-1 and Canon AE-1), light meters and blood sugar testers. This 4SR44 or PX28-S battery is a popular replacement for the now discontinued PX28 mercury battery. These mercury batteries, no longer manufactured because of their toxicity, were variously known as PX28, 4MR44, V4034PX, 4H-C, 4NR44, HM-4C. The 4SR44 or PX28S batteries have a shelf life of 8 + years, so why not buy two or more.This Silver Oxide 4SR44 cell has exactly the same dimensions as the alkaline 4LR44s, but has a longer battery life. You can always use this silver oxide 4SR44 battery in place of an alkaline 4LR44 for improved performance and less frequent battery changes. 6V Silver Oxide Battery Specifications Type: Silver Oxide, Voltage: 6V, Diameter: 0.5in (13.0 mm), Height: 0.99in (25.2 mm), 6V Silver Oxide Battery Fits and Replaces 4SR44, V28PX, PX28, 544, KS28, RPX28, S1325S, S1325, PX28-S, 1406SOP, RFA1611, RFA-16-11. 6V Silver Oxide Battery Compatibility Eveready: 246, 2N6, PP6, S106, Exell Battery: 246, Iec: 1602, 6F50-2, 6F502, ADRY1781, Neda: 1602,