Buy in bulk and Save! 60 x Cells Quality Hearing Aid Battery Batteries Primary (Non-Rechargeable) Description Hearing Aid Button Cell Button Cell Application Hearing Aid Product Group Zinc Air Product Sub Group Hearing Aid Button Cell Chemistry Zinc Air Voltage 1.4V Nominal Capacity 280mAh Brand Zenipower Size Button Diameter/Width 7.8mm Height 5.25mm Weight 0.86g 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. Price is per pack of sixty Cells (10 x packs of six)