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Re: 722 batteries/cases

Subject: Re: 722 batteries/cases
From: "werainey" <>
Date: Sun, 09 Oct 2005 05:09:16 -0000
Rob,
Looks like a convenient choice. The option mentioned earlier (not still up =
on
the net AFAIK) used remaindered  Compaq laptop packs and charger for 12V to=

a regulator, then a DAT recorder. Compaq's web site sporadically has batche=
s=20
of batteries. A bit lower cost, but more modification (to incorporate an ou=
tput
cable) than the batteryspace.com option.
Unrelated query, but any opinion from specs of the Peluso CEMC6 microphone=

for nature sound? Perhaps missed it but haven't seen it mentioned here. Bil=
l R.


--- In  Rob Danielson <> wrote:
>
> Or maybe retrofitting LiIon laptop batteries would fit our budgets?
>
http://www.batteryspace.com/index.asp?PageAction=3DVIEWPROD&ProdID=3D1529
&HS=3D1
> Could one make a parallel wiring harness for two of these and get 8AH
> at 16 volts for a 722/744?  They'd weigh about 1/2 as much as NiHM.
> They come with a charger too. The Ultralife LiIon bricks might be
> mostly a military item at this point. Rob D.
>
>   =3D =3D =3D =3D
>
> At 5:14 PM +0000 10/7/05, werainey wrote:
> >Info on commercial LiIon 12v batteries is available at:
> >http://www.ultralifebatteries.com/subcategory.php?ID=3D1.
> >
> >We've been monitoring improving LiIon battery options for several
> >years (e.g., price per watt/hr, availability of light weight solar
> >chargers or ICs to build them). Some like these are starting to appear
> >as military surplus, but are not yet affordable on our budget (thus
> >the 'probably' in my previous message).Sorry if that was unclear.
> >
> >An alternative described on the net exploits low cost remaindered
> >multicell LiIon laptop batteries and AC chargers to power field
> >recording gear.Bill R.
> >
> >--- In  Rob Danielson <> wrote=
:
> >>
> >>  Thanks for the useful info, Bill. The portability looks terrific.
> >>  Would take many square feet to charge a 10X 10,000 mAH D-cell pack in
> >>  one day's sunlight, but recording off the grid might be doable with
> >>  multiple, pre-charged packs. Can I ask where you're getting your 12V
> >>  lithium 'brick' batteries?  The ones I've come across in bulk have
> >>  been fairly low capacity. Rob D.
> >>
> >>    =3D =3D =3D
> >>
> >>  At 9:14 PM +0000 10/6/05, werainey wrote:
> >>  >An alternative to the inconveniently bulky roll-up flexible solar
> >panels are
> >>  >sectional thin film panels on waterproof fabric. These are lighter
> >weight and
> >>  >fold into remarkably small packages. A new generation of them is als=
o
> >>  >affordable and performs pretty well under cloud cover. To power
> >ultrasound
> >>  >monitors we're using six 6-watt panels which each weigh 1 lb  and
> >cost ca
> >>  >$90. Panels up to 40 watts are still quite portable. One mfg with
> >product info
> >>  >on their site is www.globalsolar.com.
> >>  >
> >>  >A 12V lithium 'brick' battery would have about the same bulk as
> >your NiMH
> >>  >D-pack, but would weigh about half as much, have much lower self
> >discharge,
> >  > >and probably cost something more than 4X as much.
>
> [Non-text portions of this message have been removed]
>






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