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Old May 20, 2003, 7:40 PM   #1
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Default using energizer AA lithium batters vs. nihm rechargables

I'm heading off to Europe for six weeks of backpacking. Not wanting to deal with rechargable batteries and that sort of thing, I've avoided taking my digital cam with me on trips like this, but have decided to give it a shot this time.

I noticed that energizer now makes AA lithium batteries. My camera, a Fuji Finepix 4700zoom, uses AA batteries, but is quite notorious for eating alkaline batteries alive. So, my question for you vastly more knowledgable people than I is... will lithiums truly do me better? I'd love to take the rechargables and all, but that would then require buying the adaptor plugs and all. This isn't even really the big problem, but more that I won't really have a large number of outlets available to me on a regular basis, as I'll be staying in hostels and whatnot, and the batteries charge quite slow.

So, what do you all think? Do I go with lithiums and toss 'em when I'm done, or do I go through the hassle of getting an adaptor and just dealing with the long charge times? Bear this in mind, as well: I'm taking my 35mm SLR for most pictures; the digital just for occasional snapshots and for use with occasional email updates to family and friends back home.

Thanks for your help. everyone.

Robert
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Old May 20, 2003, 8:34 PM   #2
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Never tried them before …
http://www.smallbattery.company.org....aa_lithium.htm

Quote:
These Lithium AA batteries weigh one third less than standard alkaline batteries and offer outstanding performance in extreme temperatures. The secret lies in the Lithium Iron Disulphide chemistry which delivers a colossal 2900mAh..
These batteries have a shelf life of up to ten years, 20% longer than alkaline equivalents. Why not buy two or more packs, take advantage of our reduced price and make sure you are not left without a camera next time your battery runs out.
Seems interesting …
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Old May 25, 2003, 2:24 AM   #3
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Lithiums will last longer than rechargeables....but cost about the same. If the price isn't a problem I would go with the lithiums.
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Old May 25, 2003, 9:54 AM   #4
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FYI $5.99 @ Best Buy for 1-time use or in case of emergency:
Monster® Ultra Gold AA Alkaline PowerCells 2850mAh



http://www.monstercable.com/powercel...l.asp?pin=1791
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Old May 25, 2003, 3:49 PM   #5
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Remember though folks,
NimH are 1.2V , lithums will generate more heat as the voltage reg drops the increased voltage of 1.5v. It would be interesting
to compare run time results though....
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Old May 25, 2003, 5:35 PM   #6
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5.99 $ for an 2850 mAh emergency pack is very reasonable
But for regular use, sure it’s not economical

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Originally Posted by jenk
Remember though folks,
NimH are 1.2V , lithums will generate more heat as the voltage reg drops the increased voltage of 1.5v.
Jenk, I doubt it; I guess that cameras are like any “hi tech toys” now, using switching power supply techology , instead of the old linear regulator which “throw away” power as heat. NHL would agree on this too .
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Old May 26, 2003, 7:10 AM   #7
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Actually, BB has this too for $4.99:


http://www.monstercable.com/powercel...l.asp?pin=1559

Same rating just different packaging... I'll go for red, especially for a $1 less! 8) 8) 8)


BTW Kcan is correct. Switching regulators operate by varying their duty cycle (ie ON/OFF time) to average out the correct voltage used by the camera's internal electronic. So in practice a higher voltage will actually makes the camera run cooler (ie OFF states more) than if a battery is depleted, since the switcher has to stay "ON" more often than "OFF". This is opposite to a linear voltage regulator which will dissipate the higher voltage as heat. A digital camera will actually run 'hot' when its batteries are weakened...

Most portable electronics run on 3.3V, 2.5V and some digital cores even run @1.8V or less, so bleeding the voltage off as heat is not very efficient, especially on newer cameras that run only on just two AA's! :lol: :lol: :lol:
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Old May 30, 2003, 7:11 PM   #8
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Thanks for the update on battery regulators!

Out of curiosity, I bought some of thoses e2 batts that Kcan
said were 2900mah and compared them with my uniross 2000mah
batts

Result:

2900mah e2 lasted 1h 45 mins

2000mah uniross 1h 30 mins

(camera was a fuji 40i)

here in the UK, 2300 mah Nimh batts have just come out.
I'll be getting a set of these to see how they compare to
the e2's.

Cheers.
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Old May 30, 2003, 11:20 PM   #9
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jenk

So the 2900mAh have (in theory) 45% more power, but really last only 16% longer. I sure hope you didn't pay a lot extra for the more powerful batteries!
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Old May 31, 2003, 3:59 AM   #10
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Hehe,
It was one of those 'had to know' niggles I had (the batts cost
me about 2 pints of beer!)

If my maths is correct then the e2's have the equivalent power
of the new 2300mah NiMh's. (2000mah + 16% extra of the e2's)

Like to see next, if this holds true...

Jenk.

BTW 2000mah NiMh's cost me 4 pints of beer, except these have
the magic ability to 'refill' themselves.. unlike my empty glass!
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