Unicell S400PX 1.55V Silver Oxide Battery replaces 394X, 400PX, E400N, EPX400, H-B, KX400, M400PX, PX400, RM400R, S936, S936S, T400N, V394X

This battery will replace discontinued mercury models cross referenced to this model. Equipment formerly using the mercury model will work although some recalibration may have to be taken into account due to the slightly different voltage & discharge characteristics.