At 12:25 1/10/01, Mickey asked:
Does anyone understand the cross reference of battery names? I believe the
OM-2 manual calls for EP-76. I haven't seen that anywhere, but an EPX-76
crosses to a 357. Is an SR-44 equivilent to a 357? What is an SR-44W or
SR-44SW? Which is right for my OM-2? I suppose it has to do with drain
characteristics.
Thanks,
Mickey
Mickey,
Here are the specs on cells from the OM FAQ. The mercury cells listed in
the far right column are for the OM-1[n], the rest are for the other OM's:
OM-2[n,S]/3[ti]/4[T,ti]/10/20/30/40 | M-1/OM-1[n]
-----------------------------------------------|-------------
ANSI Spec. 1131SO 1107SOP 1166A | 1124MP
IEC Spec. SR44 SR44 LR44 | MR9
Chemistry AgO AgO Alk. | Mercury
|
Bulova 228 |
Duracell D357 MS76 PX76A | PX625
Eveready 357 EPX76 A76 | EPX625
Kodak KS76 KA76 KX625 |
Maxell SR44W SR44P LR44P |
Panasonic SP357 G13 LR44 | H-D
Rayovac 357 RS76 LR44 | RPX625
Renata 357 |
Seiko SR44W |
Timex J |
Toshiba SR44W SR44 LR44 | MR9
Varta V357 V76PX V13GA | V625PX
-----------------------------------------------|-----------
Note the difference in the ANSI spec between the first and second
column. They are both AgO (Silver Oxide). The difference is subtle, and
the cells are interchangeable, but the first column are designed for a
small continuous drain as one might find in a watch or clock. They are
slightly friendlier in the OM-2S/4[T,ti] that have a continuous drain.
The third column is alkalines. Neither these nor lithiums should be used
in the OM's, especially the OM-2S/4[T,ti]. A gradual voltage falloff kicks
in as they are used. It will cause metering to drift, and in the later
bodies I listed they will fail sooner as a result (mirror-lockup).
There is also a 3 Volt alkaline the same size as two LR44's, and I've been
told there is also a lithium like this too. I don't believe there is an
AgO equivalent, at least I've never seen one. Sometimes you find one of
these in an OM body in place of the normal pair. They should not be used
either, for the same reasons as not using the LR44's.
-- John
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