I suggest you go look at the self discharge curve showing capacity
remaining vs time.

to summerize in case you cant understand the chart:

"I read thru it briefly, it looks like they have improved the self
discharge curve with regards to remaining capacity of the battery. but
its only 10% improvement after 30 days, a 20% improvement after 6 months
and an infine improvement after 9 months because a standard nimh would
be dead. "



SO, if you go a whole month without using your camera, your batteries
only have 10% more
charge left than standard nimh, I would not call that a "game changer" I
call that
marketing hype if one month is you reference. Sure they are way better
at 6-9
months with respect to self discharge, but who in the hell charges their
batteries and then lets them sit
6-9 months before using them at all? Not me. I use my charged batteries
within minutes or days, weeks at the very outside most.

What you have there is a "feature" that never gets used in the real
world IMHO.
That kind of feature is never going to be called a game changer for
digital cameras in my book.
might be real good if you have a power outage for 6-9 MONTHS, your
flashlight would still work!

JC O'Connell
[email protected]
 


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Bruce Walker
Sent: Monday, December 22, 2008 8:07 PM
To: Pentax-Discuss Mail List
Subject: Re: rechargeable batteries - any wisdom?


JC OConnell wrote:
> is the "out of the package" 80% charge that important
> in the real world or is it a marketing scheme.
>   

It's a side-effect of the very low self-discharge characteristic, and is

not at all important to me.

I agree that the "charged when new" thing is a marketing scheme, but 
it's quite a reasonable one because you can't sell "low self-discharge" 
to Joe Lunchbox or Aunt Tenna.  And it would appear to be working 
because now Sony and Duracell are reselling Eneloops under their own
name.


The crucial aspects of Eneloops that make them game-changers for me are 
the afore-mentioned low self-discharge, and the very flat voltage over 
time discharge curve together with reasonable capacity.

The Eneloop's 2000 mAh capacity is admittedly less than the 2700mAh 
cells available, but they work better in actual practice (at least in my

K100D Super) because the voltage droops fairly early in the discharge 
cycle of a typical Energizer or even the Ansmann-badged cells that came 
with my charger such that I only get about 200-300 shots before the 
camera quits.  I get 800-900 shots with the Eneloops under similar 
conditions.

With the low self-discharge I can charge the Eneloops, pop them into the

camera and then forget about them until the low-batt indicator appears.

I stuff everything into my kit-bag until I need it -- even if several 
weeks go by before I suddenly need to grab the bag and dash out 
somewhere to shoot.  I never worry at all about whether I charged up 
batteries the night before.


> For me, I would rather just pay less for nimh
> that dont have a charge when new or dont hold
> charges for 3-9 months, I couldnt care less unless
> it was a free feature maybe.
>   

I have shopped around and bought Eneloops at the same price as 
Energizers, so yes, it is (or can be) a free feature.

-bmw

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