Connevans supply size 312 (brown tabbed) zinc air hearing aid batteries from a range of brands - Rayovac, PowerOne, Duracell, Phonak & Signia. Individual packs of 6 or boxes of 10 packs of 6 batteries.
Size 312 battery equivalents: 312, 312A, 312MF, 312AU, 312HPX, DA312, DA312H, 312HP, AC312E, AC312, ME7Z, 312AE, L312ZA, 312AE, 312A, ZA312, PR312, PR41, 312SA, S312A, 312AP, V312AT, W312ZA, ZA312, P312, 312DS, A312, PR312H