You can check the document I put up on Mark Dapoz's Oly repair website, which
also includes data
for EPX76.
In general the EPX76 has lower capacity over the OM's operating range of
voltage than the
recomended 357's. Something like 20% less.
The cold weather performance in general will be better with lower internal
impedance cells that
are less than 20% discharged. The impedance rises as you discharge deeper and
the impedance also
increases at low temperature, which is ultimately what limits low temp
performacnce in OM's. It
helps a lot to keep exposure times short, say 1/125sec or above. The
manufacturers don't specify
the impedance in a very useful way to allow real comparisons of all vendors
brands. I
My document above does include quite a bit of calculated impedance data, based
on the vendors data
sheets, but it is still hard to compare precisely.
Tim Hughes
--- Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> You'll have to compare the mfgr's spec sheets
>
> Chuck Norcutt
>
> Chris Crawford wrote:
> > I have been using the Engergizer 357/303 batteries the last couple years
> > when I was living in New Mexico and never saw any problems with them. After
> > moving back to northern Indiana, I took my two OM-4T bodies out on a very
> > cold day to photograph an old building, and the batteries died within ten
> > minutes of going out in the cold. After I got home and they warmed up, they
> > worked again.
> >
> > I have two questions if anyone on the list knows:
> >
> > Do the batteries that Bill is offering work better in cold weather.
> >
> > And
> >
> > I was looking at the Energizer website and they mention an EPX76 battery
> > that they say is designed specifically for cameras. Their data sheet shows
> > it has a higher amperage than the 357/303. I went and bought some of these
> > batteries at a local store but they are EXPENSIVE. $4.50 EACH. Has anyone
> > tried these in their OM's, and do they work better than the 357/303 and are
> > the Sony batteries that Bill has better or the same as these? If they're
> > equal or better I'll get some from him, given how cheap they are compared to
> > the engergizer EPX76 bought locally.
> >
> > Thanks,
> >
> >
> >
>
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