Comments on: Another forgettable fuel cell http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/ the blog that is not dansdata.com Sun, 06 Dec 2009 21:10:49 +0000 http://wordpress.org/?v=1.5.1-alpha by: Techskeptic http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2993 Mon, 08 Sep 2008 15:35:21 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2993 Hi, I have been looking at this product for a while now. Came to the same conclusion with some actual test data. Feel free to take a look if you like: http://techskeptic.blogspot.com/2006/04/medis-power-pack.html http://techskeptic.blogspot.com/2006/04/medis-power-pack-part-deux.html http://techskeptic.blogspot.com/2008/01/medis-finale.html http://docs.google.com/Doc?docid=dhnk7t47_8dnxvtkcv&hl=en yeah, ultimately the same conclusions. Its nonsense. I just have tests to back that up. Hi,

I have been looking at this product for a while now. Came to the same conclusion with some actual test data. Feel free to take a look if you like:

http://techskeptic.blogspot.com/2006/04/medis-power-pack.html
http://techskeptic.blogspot.com/2006/04/medis-power-pack-part-deux.html
http://techskeptic.blogspot.com/2008/01/medis-finale.html
http://docs.google.com/Doc?docid=dhnk7t47_8dnxvtkcv&hl=en

yeah, ultimately the same conclusions. Its nonsense. I just have tests to back that up.

]]> by: Coderer http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2919 Tue, 26 Aug 2008 01:24:11 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2919 "Electronic Metro" makes a "triple charger" that runs from 110VAC, 12VDC (lighter outlet), or 2 9V batteries: http://www.woot.com/Blog/ViewEntry.aspx?Id=4585 I got a bunch of them 'cause they're cheap and had packages with "heads" (adapters) for a couple of devices I charge regularly. It let me cut down from ~3 different car chargers to just one, which is nice. Still, I think 9V is probably the least cost-effective battery to base a charger on, so not *exactly* what you're looking for. "Electronic Metro" makes a "triple charger" that runs from 110VAC, 12VDC (lighter outlet), or 2 9V batteries:

http://www.woot.com/Blog/ViewEntry.aspx?Id=4585

I got a bunch of them 'cause they're cheap and had packages with "heads" (adapters) for a couple of devices I charge regularly. It let me cut down from ~3 different car chargers to just one, which is nice. Still, I think 9V is probably the least cost-effective battery to base a charger on, so not *exactly* what you're looking for.

]]> by: Itsacon http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2917 Mon, 25 Aug 2008 20:50:59 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2917 No, it doesn't. Bicycles (can) have alternators too. They're often (depending on location) referred to as dynamos, which is technically incorrect as a dynamo is a DC device, while bicycle generators are invariably AC devices. But all my bikes since childhood (except for my racing bike) have had them. They generally put out 6V AC, though modern hub models (as opposed to older rim models) can put out 12V AC. \ No, it doesn't. Bicycles (can) have alternators too. They're often (depending on location) referred to as dynamos, which is technically incorrect as a dynamo is a DC device, while bicycle generators are invariably AC devices.
But all my bikes since childhood (except for my racing bike) have had them. They generally put out 6V AC, though modern hub models (as opposed to older rim models) can put out 12V AC.

\

]]> by: Jax184 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2915 Mon, 25 Aug 2008 17:52:45 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2915 That assumes "bike" refers to a motorcycle and not a bicycle. That assumes "bike" refers to a motorcycle and not a bicycle.

]]> by: Itsacon http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2914 Mon, 25 Aug 2008 17:28:22 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2914 @Darius: Why not just connect an AC-DC converter to the bike's alternator and use an USB charger? @Darius: Why not just connect an AC-DC converter to the bike's alternator and use an USB charger?

]]> by: Darius http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2909 Mon, 25 Aug 2008 12:31:59 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2909 A friend of mine used to go bike riding to remote locations with 2 6V gel cells taped together with a car phone charger plugged into them.. 30 days standby time! :) (This was for an old analogue handset) A friend of mine used to go bike riding to remote locations with 2 6V gel cells taped together with a car phone charger plugged into them..

30 days standby time! :)
(This was for an old analogue handset)

]]> by: Daniel Rutter http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2903 Sun, 24 Aug 2008 13:45:44 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2903 Thanks for the extra info! I've updated the post. (I've added a link to <a href="http://www.dansdata.com/gz066.htm">my piece</a> about the Voller Automatic Battery Charger, too.) Thanks for the extra info! I've updated the post.

(I've added a link to my piece about the Voller Automatic Battery Charger, too.)

]]> by: arteitle http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2902 Sun, 24 Aug 2008 12:58:38 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2902 Here's the most relevant Wikipedia article: <a href="http://en.wikipedia.org/wiki/Direct_borohydride_fuel_cell" rel="nofollow">Direct borohydride fuel cell</a> Here's the most relevant Wikipedia article: Direct borohydride fuel cell

]]> by: phisrow http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2901 Sun, 24 Aug 2008 12:33:55 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2901 Amusingly, the MSDS also notes some fairly dramatic restrictions on transport of this little device. Most notably, the "3 per flight" limit for passenger flights in the US and Canada. On the plus side, these things look doomed to unpopularity, so I doubt it'll ever come up; but building a mass-market portable power source of which only 3 can be carried on any given passenger flight seems stupid. Amusingly, the MSDS also notes some fairly dramatic restrictions on transport of this little device. Most notably, the "3 per flight" limit for passenger flights in the US and Canada. On the plus side, these things look doomed to unpopularity, so I doubt it'll ever come up; but building a mass-market portable power source of which only 3 can be carried on any given passenger flight seems stupid.

]]> by: arteitle http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2899 Sun, 24 Aug 2008 12:15:36 +0100 http://dansdata.blogsome.com/2008/08/23/another-forgettable-fuel-cell/#comment-2899 More info... Wikipedia says about <a href="http://en.wikipedia.org/wiki/Tetrahydroborates" rel="nofollow">tetrahydroborates</a>: "Tetrahydroborates have the potential to store hydrogen for mobile applications because of their large gravimetric and volumetric hydrogen density for hydrogen. Hydrogen is difficult to transport and store because of it is gas at room temperature. In order to transport and store hydrogen, chemical combinations with metals must be made. Tetrahydroborates offer a means of transport and storage of hydrogen because they have the highest gravimetric hydrogen density known today." More info... Wikipedia says about tetrahydroborates: "Tetrahydroborates have the potential to store hydrogen for mobile applications because of their large gravimetric and volumetric hydrogen density for hydrogen. Hydrogen is difficult to transport and store because of it is gas at room temperature. In order to transport and store hydrogen, chemical combinations with metals must be made. Tetrahydroborates offer a means of transport and storage of hydrogen because they have the highest gravimetric hydrogen density known today."

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