 Benjamin Baron |
What batteries to use ?? I have a Yashica TL Electro that uses ( I've been told 2 PX640 batteries ), I can not find this anywhere here in my town , can I sustitute with a PX28A battery ? , two 640's are 3v and one 28 is 6v , your advice will be appreciated. B.
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Jon Close |
The PX640 were mercury-based and have been phased out for environmental concerns. Mercury cells produced 1.3v. You can replace them with similarly sized alkaline or silver-oxide cells, but they are slightly higher voltage ~1.5v and may through the meter readings off. I would not use a 6v replacement. If you do a search you will find that there are replacment air-zinc cells that reproduce the 1.3v output of the mercury cells, but they tend to have short lives. Another alternative is to buy or make a small voltage regulating adaptor that reduces the voltage of alkaline and silver-oxide cells to 1.3v. See http://www.colyngoodson.com/Pdf/battery%20adapter.pdf and http://www.kyphoto.com/classics/mercurybattery.html for more information, including a list of makers of these adaptors. I also remember seeing instructions for cheaply making your own adaptor, but I don't have the link.
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