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Old Jun 1, 2003, 12:13 AM   #11
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And if you ever find a way to recharge that beer glass, you'll be a very rich man.

You might find this page interesting:

http://www.imaging-resource.com/ACCS/BATTS/BATTS.HTM

a large comparison between over 30 batteries. It's a little out of date, but I find it still useful.
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Old Jun 21, 2003, 3:37 PM   #12
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For those who may be interested,
I got some nimh 2300mah batts and they do last as long as the lithum e2 batts. The lithum batts though have a better 'shelf life' (ie
do not self discharge like the nimh), if you take few photo's.
also lithums are better in colder climates...

Jenk.
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Old Dec 20, 2005, 10:23 PM   #13
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There is a great recharger for beer glasses .... it is call a full KEG
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Old Dec 20, 2005, 10:23 PM   #14
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There is a great recharger for beer glasses .... it is call a full KEG
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Old Dec 21, 2005, 8:57 AM   #15
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Besides the difference between linear and switcher power supplies mentioned above (good point - not many people know about that stuff), there are two other considerations that make comparisons of mAh of different battery technologies an apples to oranges comparison (or for this crowd, a Budweiser to Michelob comparison):

(1) The cutoff voltage of the particular camera - IOW, at what battery voltage level does the camera automatically cutoff.

(2) The internal resistance of the battery (think of it as battery "stiffness"). IOW - for a givenlevel of charge, a battery will have a certain voltage - *BUT* that voltage will get pulled down with a load. Some cameras have more load than others (also - is the LCD viewer turned on, etc.). A battery with a higher nominal voltage but with a lot more internal resistance may actually cut the camera off under load due to the pull down, yet the lower voltage but stiffer battery may actually run the camera longer (as withNiMH's vs. alkalines). Also, even if the higher internal resistance isn't high enough to drop the voltage enough to cut the camera off, it generates more heat which is energy wasted and not converted to useful work (capturing pixels, zooming, charging the flash, etc.) - so it depletes faster even if the mAh rating is the same.

(1) and (2) combine to almost make it meaningless to compare mAh ratings between different battery technologies (or between batteries of the same technology but different internal resistance/efficiency at a given current load).
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