All I know is that I use (3) silver oxide cells to power up my Hewlett-Packard HP-15C calculator. Those cells last between 6 and 10 years. Bought that machine new in 1984, and it's now on it's 4th set of those cells.
Chuck > > >---- Original Message ---- >From: offl...@zeelandnet.nl >To: neonixie-l@googlegroups.com >Subject: RE: [neonixie-l] Re: Whatbox >Date: Sun, 6 Apr 2014 22:12:37 +0200 > >>Hi Charles, >> >>Can you tell me the type Zn-O2 Cell that could be used for camera's >and >>exposure meters? I am still preserving some PX625's in the fridge, >but once >>they will be empty. >>Do they stand longer as those for hearing aids? Or can you even >stop the >>process? >> >>eric >> >>-----Original Message----- >>From: neonixie-l@googlegroups.com >[mailto:neonixie-l@googlegroups.com] On >>Behalf Of Charles MacDonald >>Sent: zondag 6 april 2014 21:53 >>To: neonixie-l@googlegroups.com >>Subject: Re: [neonixie-l] Re: Whatbox >> >>On 14-04-05 01:16 PM, Instrument Resources of America wrote: >>> Speaking of batteries. I don't know how many of you buy batteries >>> (cells) at Harbor Freight Tools, but be aware that they sell >several >>> different cells with different chemistries. Alkaline, which I've >>> bought lots of and had no problems, and some VERY INEXPENSIVE >cells, >>> that I've been told by another customer standing in line with me >the >>following. >>> That they were the decades old ZnMgO chemistry, >> >>There are a few types of button cells, The so called ZInc-Air cells >are used >>in Hearing aids where the battery runs down in a few days of use no >mater >>what. They have a seal that you pull off to activate them, and then >you >>start the limited life. >> >>They have the advantage of producing 1.35 volts just like the now >banned >>Mercury batteries. There is a version made for photographers who >use >>equipment that depends on the fixed voltage. >> >>Alkaline are common, the in circuit voltage declines in use. Silver >Oxide >>are longer lasting but more expensive, and have a relatively >constant 1.55V >>output. >> >> >> >>>> If you have cells in series, >>>> there will always be one cell that that "runs out" first. When it > >>>> does, the rest in the series will "charge" it. Very few >chemistries >>>> or constructions are suitable for this, and generally instead, >the >>>> water within the electrolyte hydrolyses to hydrogen and oxygen. >The >>>> gas produced naturally expands until some portion of the case >fails. >>>> >>>> This is a long-winded explanation that says, if you assemble a >90V >>>> cell, use the chemistry they did back then with the type of cells > >>>> they used back then, or design your experiment to deal with >potential >>>> explosion and/or fire. >> >>One potential offset to this is that as most cells wear out they >build up a >>good amount of internal resistance. this limits the available >current. YMMV >> >>This however does reinforce the rule that you should never mix >batteries on >>a series combination as that does create the risk of one wearing >down when >>the rest of the group are still very lively and running with little >internal >>resistance. >> >>-- >>Charles MacDonald Stittsville Ontario >>cm...@zeusprune.ca Just Beyond the Fringe >>http://Charles.MacDonald.org/tubes >>No Microsoft Products were used in sending this e-mail. >> >>-- >>You received this message because you are subscribed to the Google >Groups >>"neonixie-l" group. >>To unsubscribe from this group and stop receiving emails from it, >send an >>email to neonixie-l+unsubscr...@googlegroups.com. >>To post to this group, send an email to neonixie-l@googlegroups.com. >>To view this discussion on the web, visit >>https://groups.google.com/d/msgid/neonixie-l/5341B0B7.7080802%40zeus >prune.ca >>. >>For more options, visit https://groups.google.com/d/optout. >> >>-- >>You received this message because you are subscribed to the Google >Groups "neonixie-l" group. >>To unsubscribe from this group and stop receiving emails from it, >send an email to neonixie-l+unsubscr...@googlegroups.com. >>To post to this group, send an email to neonixie-l@googlegroups.com. >>To view this discussion on the web, visit >https://groups.google.com/d/msgid/neonixie-l/!%26!AAAAAAAAAAAYAAAAAAA >AAPDddShx705MuX20yCpp0vvCgAAAEAAAAAUZ390Yxo5BpduELXRH%2BH0BAAAAAA%3D% >3D%40zeelandnet.nl. >>For more options, visit https://groups.google.com/d/optout. >> $4.95/mo. National Dialup, Anti-Spam, Anti-Virus, 5mb personal web space. 5x faster dialup for only $9.95/mo. No contracts, No fees, No Kidding! See http://www.All2Easy.net for more details! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/380-22014406201714981%40all2easy.net. For more options, visit https://groups.google.com/d/optout.
