On 28 Oct 2001, at 8:21, [EMAIL PROTECTED] wrote: > Alkaline A76 button cells seem to work fine in my Super Program > and KX (I don't remember what's in the ME right now), but I've > got the impression that they're not lasting very long. Since I > haven't been writing down my battery changes (I'll start doing > so now), I was wondering whether anyone could comment on the > relative life of the A76 cells versus the silver S76 or EPX76 > cells. If the silver cells do last longer than the alkalines, > do they last long enough to be worth the increased price? (At > the store where I saw them yesterday, alkalines were $0.98 each, > and silver cells were $2.90 each. Do the silvers last three > times as long?) > > Also, I noticed lithium cells labelled "276" or something like > that, which were 3V and looked just like a pair of 76 batteries > stacked atop each other, for a little less than the cost of two > silver cells ($4.98, IIRC). Am I right in my guess that my > cameras would be just as happy with one of these as with a pair > of S76s? And do they last at least two and a half times as long > as a pair of alkalines?
Glen, The following is from a post of mine back in Feb '99 relating to the 4LR44 for the 67 but should relate to the LR44 just with a 1/4 of the terminal voltage, also FWIW I have been using the Lithium cells for years now. I can't remember when I last bought alkaline or Silver button cells, they work flawlessly in the ME Super, SuperA and LX, they have about a 10 year shelf life and they perform well in the cold: "I did a little research and found the following: Approximate self discharge rates: Alkaline batteries : 5 % / year (PX28A, A544, 4LR44 105mAh capacity) Silver oxide : 5% / year (PX28, 544, 4SR44 160mAh capacity) Lithium batteries : 1% to 2% / year (PX28L, L544 160mAh capacity) >From the data above we can surmise that for low current applications (ie Pentax 67 operation) the Silver oxide and lithium cells should offer similar operational life over the short term (eg under 6 months) however the Lithium cells will allow longer storage period." Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://www.ozemail.com.au/~distudio/publications.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
