http://www.maine.gov/dep/rwm/publications/legislativereports/pdf/buttonbatteriesreportjan09.pdf
This article has general information about totally Mercury free button cells.
They say longevity is unknown at present, as well as incidence rates of leakage
etc. Seems like capacity and other characteristics may be lower too.
After 2011 these may be the only types of cells available in many places.
Interestingly NL is suing some other Chinese manufacturers for infringing their
Hg free patents.
Tim Hughes
--- On Sun, 8/23/09, Hughes <hi100@xxxxxxxxxxxxx> wrote:
> From: Hughes <hi100@xxxxxxxxxxxxx>
> Subject: Re: [OM] Olympus Power Bounce Grip 2
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Date: Sunday, August 23, 2009, 11:30 PM
> I think the actual battery
> manufacturer for the Ultralast UL357's I mentioned (NL
> markings on the cell) previously,whose specs I could not
> find, may be this company "New Leader" whose blurb I
> have copied here:
>
> >
> New Leader Battery Industry Ltd. was established in 1983.
> We are one of the leading battery manufacturers in Hong
> Kong. With our advanced and comprehensive production
> facilities, our batteries are endorsed globally by
> electronic toys, gifts and premium industries. Our major
> products include alkaline manganese button cells, silver
> oxide button cells, lithium manganese dioxide batteries,
> zinc chloride primary batteries, 9V 6F22 and 12V 23A 27A
> batteries. We believe that mercury free batteries will
> propel us towards the leading edge in world battery
> technology. Mercury free batteries will also fulfill our
> mission statement towards environment friendly batteries.
> Since 1998, we have invested large amounts of resources to
> the research of mercury free alkaline button cells. By the
> end of year 2000, we have successfully launched the world's
> first mercury free buttons cells and gained the patent in
> HKSAR, China. This new leading technology is now pending to
> be
> patented in other countries as well. These new products
> are well endorsed by many renowned toys, gifts, and premium
> enterprises. New leader mercury free button battery is fully
> complied with EEC RoHS directives, 98/101/EC, and 91/157/EEC
> battery directives as well as to meet with EEC or US
> electronic and electrical industrial standard. Our Guangdong
> Zhaoqing factories were built on self-owned land, composing
> 6 blocks, with 500,000 square feet. Currently we employ over
> 3000 employees and are building other production plant to
> meet with the ever growing demands of our clients. We
> currently employ more than 300 staff in quality assurance
> (Q.C), research & development, and production
> engineering to carry out the ISO9001 quality management
> system. From raw materials, each part of processing to final
> products, these procedures are under strict quality control
> to ensure all new leader batteries have good quality and
> long time use.
> <
>
>
>
> --- On Sun, 8/23/09, Tim Hughes <timhughes@xxxxxxxx>
> wrote:
>
> > From: Tim Hughes <timhughes@xxxxxxxx>
> > Subject: Re: [OM] Olympus Power Bounce Grip 2
> > To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> > Date: Sunday, August 23, 2009, 11:13 PM
> > Hi Joel,
> > thanks for kind words.
> >
> > I was just using my OM gear again alongside some
> digital
> > gear, and it is always such a pleasure to actually
> shoot
> > with OM.
> >
> > It is true that somehow I have been involved in
> dealing
> > with batteries from High School days when I built my
> own
> > lead acid batteries and wet leclanche cells, through
> dealing
> > with batteries in a more professional capacity for
> medical
> > applications, implants etc. Also developing and
> building
> > battery test equipment for high speed cycling and
> measuring
> > battery impedance,recombination etc etc .
> >
> >
> > With all the interest in batteries for cars and
> solar,
> > there is a lot happening in battery research and some
> > batteries with amazing specs are starting to come to
> market.
> > For example LiFePO4 bateries are currently available
> with
> > very high cycle life and recharge times under 15min
> and very
> > high discharge rates. Research versions of similar
> batteries
> > with well under 1min recharge times have been
> demonstrated,
> > which would be very useful for Hybrid or electric
> cars, when
> > brought to market.
> >
> > I don't have any current favorite 357, as I still have
> a
> > refrigerated supply of everready high current 357's.
> (from
> > before they changed them for the worse to
> "357/303").
> > I did buy a couple of North American Batt
> > Corp, "Ultralast brand" UL357's marked 206maH, meaning
> to
> > test them. Unfortunately I have not had the
> > time. NABC likely just markets them, and does not
> > actually manufacture them anyway. I could not find
> any
> > real specs for them, except that the website says
> 165maH not
> > the 203mAh marked on sales slip. The cells themselves
> are
> > marked "357 , NL silver cell", most likely a
> generic
> > cell from China.
> >
> > The "high current" Sony 357 cells (not the normal
> > low current Sony cells), looked good on paper, but are
> very
> > difficult to find in distribution in North America.
> Mark
> > Dapoz has an exhaustive 357 data sheet compendium I
> put
> > together a while back on his website, but I don't have
> any
> > newer data sheets, over what I included there.
> >
> >
> > Tim Hughes
> >
--
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