I dont believe that even if this is true that it matters, I did a lot of research on NiMH batteries a few years ago because I wanted to built special chargers for them. None of the many mnay engineering pages I read on nimh technology stated there was any differences in charging, characteristics of the voltage drops on charge/discharge, pulse charging techniques, self discharge, etc. They are all very very very similar if they state nimh chemistry from an electical standpoint. I think any battery maker claiming their nimh batteries are much better in any significant electrical parameter for a given cell size and capacity in ma-Hours is selling you snake oil. Take it for what its worth...
BTW, the best way to keep fresh nimh handy is to pulse charge. Tricklw works OK, but pulse charge is better. JC O'Connell [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Adam Maas Sent: Monday, December 22, 2008 2:07 PM To: Pentax-Discuss Mail List Subject: Re: rechargeable batteries - any wisdom? General chemistry is the same, but there's a LOT of variation possible within that general chemistry. All NiMH indicates is that the chemistry uses Nickel Oxyhydride as the Anode and some Metal Hydroxide at the cathode instead of Cadmium (NiCd's use Cadmium). Quite a number of Metal Hydroxides may be used, as well as differing salt bridges, differing concentrations, etc. Specific chemistry varies between manufacturers and capacities. Note the low-self-dischage NiMH's use a different seperator between the anode and cathode chemistry which is much more effective at preventing intermixing. -Adam On Mon, Dec 22, 2008 at 1:57 PM, JC OConnell <[email protected]> wrote: > The chemistry is the same on all of them, thats why they are all > called nimh. jco > > JC O'Connell > [email protected] > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of Bruce Walker > Sent: Monday, December 22, 2008 1:10 PM > To: Pentax-Discuss Mail List > Subject: Re: rechargeable batteries - any wisdom? > > > JC OConnell wrote: >> nimh technology is nimh technolgy, > > Shrug; optical technology is optical technology too ... :-) > > In this case improved chemistry and design makes for a better NiMH > cell. > > >> I havent >> read anything anwhere that there are different/special >> characteristics > >> for any of these cells... > > http://www.eneloop.info/fileadmin/EDITORS/ENELOOP/ARTICLES/Teraoka_Art > ic > le_EN.pdf > > http://snipurl.com/901t1 > > [it's a PDF file.] > > -bmw > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
