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

Sat Feb 16 15:43:47 AKST 2008

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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