[CTSARA] Energizer Universal 18000 mAh Portable Battery PackandCharger

[Franklyn A. Ballentine, jr]

Radio Shack had a similar product made by Digipower on clearance.  I
was going to use it to power a HP PDA (320LX) and a KPC3+ or MT1200
TNC

Frank B.
KB1QZH

On Mon, Sep 14, 2009 at 1:40 PM, Chris- KB1QXR <kb1qxr at arrl.net> wrote:
> http://www.xpalpower.com/us/products/xp18000/   manual is linked from that
> page
>
>
> I think one of these might be good for charging a HT, cell phone, or other
> assorted gear, but I wouldn't run a mobile off it.
>
>
> It has 3 outputs- a USB port for 5v, and what look like barrel connectors
> for 9-12v and 16-20v.  A 'tip' is used to adapt to whatever you are
> charging- not sure if the tip signals the device to switch voltage or what.
> According to the manual, these are really putting out 5v, 10.5v and 19v.  So
> we'd need a 19v-13.8v conversion.
>
> However the max this will put out is 20v @ 3500mA.  That's (theoretically)
> about 70 watts.  At 19v that's 65 watts.  Nowhere is there a handy 13.8v
> output, the 10.5 is too low and the 19v is too high for most amateur use.
> With some voltage conversion it might work for a low power (5-25w) mobile,
> or as you say for running a HT for many hours.
>
>
> Which is really too bad- I could see a lithium power pack with the same
> footprint of an average mobile, strapped to the bottom of one being a
> popular product (especially for go-kits due to the greatly reduced weight
> compared to lead acid batteries)...  sadly this product isn't it (in my
> opinion).
>
>
>
>
> -----Original Message-----
> From: Jon Perelstein [mailto:jperelst at yahoo.com]
> Sent: Monday, September 14, 2009 11:29 AM
> To: 'Jonathan Solomon'; 'ctsara Mailman'
> Subject: Re: [CTSARA] Energizer Universal 18000 mAh Portable Battery
> PackandCharger
>
> Jonathan,
>
> Are you thinking of this thing to power radios or to power
> cellphones/laptops, etc.?
>
> Looking at the specs, there are two things that I'm unclear on, both related
> to the rated output ("Rated Output: DC 5-20V, Max 3500 mA").
>
> 1.  What kind of power can one run from a ham radio using this battery?  For
> example, 3500mA means about 25 watts output from the typical ham radio
> (13.8v x 3.5amps = 48.3 watts, and the typical ham radio is about 50%
> efficient, meaning that 48.3 watts in will result in about 25 watts out).
> For example, the FT-7800 (which is reasonably efficient radio) needs 8.5
> amps at 13.8 volts to drive 50 watts output.  Can this thing really do
> 3500mA out.
>
> 2.  How well does it regulate voltage at different output levels?  If I'm
> driving the battery at 3500mA out, will it give me 13.8v, or 12.8v or 5v or
> what?  I don't see anything in the information they're giving that would
> indicate voltage regulation ability.
>
> Jon
>
> -----Original Message-----
> From: ctsara-bounces at mailman.qth.net [mailto:ctsara-bounces at mailman.qth.net]
> On Behalf Of Jonathan Solomon
> Sent: Monday, September 14, 2009 11:04 AM
> To: ctsara Mailman
> Subject: [CTSARA] Energizer Universal 18000 mAh Portable Battery Pack
> andCharger
>
> Folks-
>
> www.woot.com offer today is:
> Energizer Universal 18000 mAh Portable Battery Pack and Charger for
> $99.99 (+$5 shipping).
>
> I buy from these guys all the time. If anybody would like one (or
> more) and doesn't want to sign up, I'd be happy to buy them for you (and get
> reimbursed!).
>
> The specs are below.  I understand it will do 12V...
>
> Jon W3EIC
> --Snip & Clip--
>
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