[pct-l] Lithium Batteries
Josh
559josh at gmail.com
Sun Mar 29 00:45:19 CDT 2009
Kerry,
Very simple, but kinda sad reason that they don't make a standard AA or AAA
rechargeable Li-ion Battery. A typical lithium-ion cell makes btwn 3.0V &
3.7V and a AA or AAA Battery only 1.5V...so a device that uses 2 AA
batteries requires 3V and to Lithium AA batteries would supply 6V...in many
instances this would be enough to fry the electronics or the bulb. I have
seen some so-called LRB (I think it stands for Lithium Rechargeable Battery)
in an AA or AAA size, but I'm not too sure on the specifics of such
batteries or the required chargers, etc.
Maybe sometime soon someone will develop a Cesium-ion battery or something
that produces an AA/AAA compatible voltage.
I also surmise that there may already be batteries in the shape of 2- tandem
AA batteries such as those used in cameras with a Voltage of around 3V...but
the disadvantage of this is the limited use to the general public in the
wide diversity of applications & devices...for example, what do U do if UR
device requires 3 AA batteries...or what if the battery holder has the AAs
end-to-end instead of tandem...for these reasons I think battery
manufacturers realize that people would prefer the flexibility of loose
individual AA cells instead of static configurations which may only have 1
or 2 devices in which they can be used.
Josh
-----Original Message-----
From: pct-l-bounces at backcountry.net [mailto:pct-l-bounces at backcountry.net]
On Behalf Of kcristler
Sent: Saturday, March 28, 2009 9:32 PM
To: Vincent Rupp
Cc: pct-l at backcountry.net
Subject: Re: [pct-l] Lithium Batteries
vin and josh,
great replys. read the reviews and learned a lot. one thing more.
They make a rechargeable lithium camera battery. Why can' t they make a
rechargeable AA?
Kerry
----- Original Message -----
From: Vincent Rupp
To: kcristler
Cc: The Incredible Bulk ; pct-l at backcountry.net ; Trekker4 at aol.com
Sent: Saturday, March 28, 2009 8:52 PM
Subject: Lithium Batteries
I think the difference is lithium (AA) vs. lithium ion (cell phone). Iif I
recall college physics correctly, ions are some sort of magic.
How long a battery lasts relates to both how the device sucks the power
and the total energy jammed into the battery.
Standard alkaline batteries aren't 1.5V for long. I tried using some in my
digital camera - got about 60 photos out of it. Then tested the batteries
with a multimeter and the voltage was still around 1.3 each. Guess it just
doesn't work at that voltage, but most electronic devices perform fine
within a range. A light just gets dimmer as the battery weakens. I think
that's why the Nimh are 1.2V - doesn't much matter for most electronics.
Energizer's lithium AA runs about $9 at Target; I think those stay at a much
higher voltage until they die. Supposedly, my camera will take over 1,000
photos (without the flash) on a set of these.
When I was battery shopping, I ran across this discussion by an engineer
on the relative merits of types of batteries (first customer review)
http://www.amazon.com/Energizer-L91BP-4-Lithium-Batteries-4-Pack/dp/B00003IE
ME/ref=sr_1_1?ie=UTF8&s=electronics&qid=1238296513&sr=8-1
On Sat, Mar 28, 2009 at 7:46 PM, kcristler <kerouc at verizon.net> wrote:
bulk and trekker,
I can't believe how tunnel visioned i am sometimes. I thought
lithiums
were rechargeable because my lithium camera battery is rechargeable.
This is
interesting. Lithiums appear to supercede alkalines in the throw away
battery class. Hikers use lithiums to avoid the hassle of recharging
NimH
batteries, i guess. But rechargeables would be much cheaper in the long
run,
correct? One quibble. 1.2 V is not equivalent to 1.5 V. That is probably
why
lithiums last twice as long as NimH. Thanks for the beta. I needed it in
my
dulled state.
Kerry
----- Original Message -----
From: "The Incredible Bulk" <taterno at cox.net>
To: <kerouc at verizon.net>; <pct-l at backcountry.net>; <Trekker4 at aol.com>
Sent: Saturday, March 28, 2009 6:20 PM
Subject: Re: [pct-l] Steri pen water purification
>I have never seen rechargeable lithium batteries in the AA form factor,
but
>that is not to say that this is not a new battery. My advise is to
read
>the package label carefully. If rechargeable is not indicated on the
>label, do not attempt to charge these batteries. Lithium batteries
have
>been known to explode if mishandled, and I have seen it first hand when
I
>used to use them for RC car racing.
>
> Tom KI6ASP
> The Incredible Bulk
> pctaddict.blogspot.com
>
>
> ---- Trekker4 at aol.com wrote:
>
> =============
> No, the only lithium's I know of are not rechargable, definitely not
if
> they're the blue and silver ones from Eveready. Regardless, an AA is
an
> AA; good
> question, but the voltage is equivalent.
> Buy your Eveready Lithiums at Sam's, $20 for 12 - a lot less than
$10
> for 4. They have a shelf life of 15 years, and last 7 times as long.
>
>
> In a message dated 3/28/2009 5:20:31 P.M. Central Daylight Time,
> kerouc at verizon.net writes:
>
> I just bought a 4 PACK of lithium AA at Wal Mart for $10. Now I 'm
> wondering
>
> about charging them. I have a AA NimH charger, but I notice they are
1.2
> volts and the lithiums are 1.5 V. Do I need a new charger for the
> lithiums?
> If so, where to buy one?
> Kerry
> ----- Original Message -----
> From: "Charles W. Davidson" <chaseat99 at gmail.com>
> To: <pct-l at backcountry.net>; "atl atl" <AT-L at backcountry.net>
> Sent: Monday, March 23, 2009 7:59 AM
> Subject: [pct-l] Steri pen water purification
>
>
>> Hi Gang,
>> I just got back from a 6 day hike. I tested out my new
>> Classic model Steri Pen that I purchased at REI. I sent the faulty
>> Journey model steri pen back to Nitro-Pak for refund. They said that
>> they found nothing wrong with it so I ended up paying shipping
including
>> the initial free shipping. The gadget worked periodically ( I just
>> retired from 36 years at Corning where I repaired electronic
>> instruments). Counting shipping and all cr123 batteries I purchased
>> testing the thing it cost me a bit. I should have gone to REI in the
>> first place and I will not use the other site again.
>> But now I am happy with the Classic model Steri-Pen. It uses AA
>> batteries and will clean twice as much or ~ 100 liters of water on 4
>> lithium AA's. I get an 8 pack Lith AA at Walmart for <$10. which is
the
>> same cost as 2CR123's. It seemed a bit odd purifying the same water
>> sources that I have drank from for many years. However it is so easy
and
>> quick that I really did not mind the 90 second wait for each liter.
The
>> device worked will with standard size small neck soda bottles or
large
>> mouth (my preference). Large mouth do not freeze up as fast as the
small
>> ones. Both store better upside down in cold weather because freezing
>> starts in the air gap on top.
>>
>> Chase
>> Photo's and video of my hike @
>>
>> My Journal http://postholer.com/chaseat99
>>
>> _______________________________________________
>> Pct-l mailing list
>> Pct-l at backcountry.net
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>>
>
>
> _______________________________________________
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> **************Feeling the pinch at the grocery store? Make meals for
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> --
> Tom
> The Incredible Bulk
> pctaddict.blogspot.com
>
>
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