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[OM] Re: rechargable lithium ion batteries

Subject: [OM] Re: rechargable lithium ion batteries
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 27 Apr 2008 12:30:21 -0400
Thanks for the feedback on the cough*ENERGIZER*cough.  :-)
Glad to hear the Eneloops are so consistent.

Chuck Norcutt


Garth Wood wrote:
> Chuck Norcutt wrote:
>> I find the best flash batteries these days to be Sanyo Eneloop.  If I'm 
>> shooting an event where I need fast recycling I will use a high voltage 
>> battery pack.  Other than that I'll use the Eneloops.  You can find much 
>> more capacity in other NiMH batteries (I hear they're up to 2800 mah 
>> now) but two sets of 2000 mah Eneloops is more than enough for any 
>> shooting situation I've ever seen and they can sit on the shelf for 
>> months (maybe even a year) without worrying about whether they still 
>> have a charge or not.
> 
> I recently bought the MAHA MH-C9000 battery charger (the one that has 
> the high-tech digital readout LCD on the front and does capacity 
> anlaysis of batteries).  I ran my three sets of Eneloops through it -- 
> each set is *very* close to the stated capacity of 2000 mAh (within 50 
> mAh, typically), and all the batteries in the set are within about 2% to 
> 3% of each other's capacity (so capacity-matching isn't a problem). 
> Other brands which won't be named (*COUGH*Energizer*COUGH*) claim a 
> capacity of 2500 mAh, but aren't even close (best I saw was just a hair 
> over 2200 mAh, with one cell below 1900 mAh), but much more worrying 
> from a capacity-matching point of view was that the little buggers' 
> capacities were all over the place.  A single set I had showed a 
> capacity range of almost 8% across 4 different cells -- that's enough to 
> deep-discharge the lowest-capacity cell when using all four of 'em in 
> one application for a long time, and possibly even reverse-charge the 
> lowest-capacity one.
> 
> I'll stick to Eneloops.  I'm now using the Energizers as test sets only. 
>   Haven't tried the Imedion cells yet, but they seem to be the same idea 
> as the Eneloops (and about the same capacity, too).
> 
> 
> Garth
> 
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