Re: Sharp PC-1211 Batteries "Use 1.35V X4

From: Katie Wasserman


I remember having trouble using 1.5 volt batteries in mine. The higher voltage didn't damage it, but it didn't work either. I think that the old CMOS chips in these were very voltage sensitive. You might try zinc-air hearing aid cells as their voltage is 1.4 verses 1.55 for silver oxide.