[NSRCA-discussion] FW: Re: [SA] Spektrum AR9100 RX and A123batteries

Sun Feb 17 08:51:33 AKST 2008

The A123 cells might be the answer to powering transmitters designed  
for 8 NiCds.  Will three cells package in the space available?

Jim O

On Feb 16, 2008, at 4:43 PM, brett terry wrote:

> The smaller batteries are sold at Walmart as the Black and Decker  
> VPX pack.  $18 for a 2-cell pack.  Seem cheap enough to me. A few  
> places sell the the pack ready to go for $39, maybe that is why the  
> price seems high.
> Remove the case, throw on a pigtail, shrinkwrap the whole thing, and  
> it is ready to go.
>
> They are roughly 1000 mAh usable, more available current than our  
> planes can possibly pull, and very little voltage depression  
> (voltage will always be above 5.5 - 6V, anybody fly Spektrum?), and  
> very fast charging time.  Also the design spec on the cell is 1000  
> cycles at 10C discharge.  3.5 oz weight, all up for a 2S pack.
>
> Good stuff, but we need to balance the pros and cons.
>
> Brett
>
> On Feb 16, 2008 7:05 PM, Ihncheol Park <pnahobbies at sbcglobal.net>  
> wrote:
> Vince,
>
> a few of local guys fly with A123 as RX pack.  They are a little  
> high on the initial voltage, but most of Spektrum receivers handles  
> fine.
> However, each cell of original size 2300mAh weighs a little more  
> than 70 grams each.  Unless you are using them on IMAC planes, not a  
> good choice.
> I know A123 cells are now available at a smaller capacity around  
> 1200mAh, but they aren't cheap.
> On the AR9100, I may be cheaper to run lipo and lighter.
>
> Ihncheol
>
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org 
> ] On Behalf Of vicenterc at comcast.net
> Sent: Saturday, February 16, 2008 10:05 AM
> To: NSRCA
> Subject: [NSRCA-discussion] FW: Re: [SA] Spektrum AR9100 RX and  
> A123batteries
>
> Another interesting option below.  Who is flying the A123  
> batteries?  Any feedback is welcome
>
> --
> Vicente "Vince" Bortone
>
> -------------- Forwarded Message: --------------
> From: Tom Fawcett <tom at wildharerc.com>
> To: vicenterc at comcast.net
> Subject: Re: [SA] Spektrum AR9100 RX
> Date: Sat, 16 Feb 2008 15:52:36 +0000
>
> Yes I have used it, if only for one flight. It works as advertised, a
> very nice product for current hungry planes. It's also easier to  
> install
> since it does not require as much wiring. If you use A123 or Nimh  
> packs
> they can be wired directly into the receiver, no switch and no
> regulators in line.
>
> As a footnote, when I used it I had two A123 lithium packs, one  
> powered
> only the receiver as "Batt 1" and the other powered the reciver as
> "Batt-2" and also powered the ignition. I have done this mow several
> times with Spektrum receivers with no problem whatsoever. The A123  
> packs
> have so much capacity it seemed a shame to carry even more for ! the  
> ign ition.
>
> TF
>
> vicenterc at comcast.net wrote:
> >
> > Hello all,
> >
> > Just would like to know opinions on this product. Any one using  
> it? I
> > like the idea of the two batteries input and the soft switch.
> >
> > http://www.horizonhobby.com/Products/Default.aspx?ProdID=SPMAR9100
> >
> >
> > Thanks,
> >
> > --
> > Vicente "Vince" Bortone
> >
> > [Non-text portions of this message have been removed]
> >
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