Re: [jornada] Extending battery life (was sound debugged)

Colin:

WiFi is power-hungry. The uptime will be dependent on the current draw of the wireless card. There are cards out there that draw as little as 60-100mW (I'd have to check the specs), but they usually have pretty terrible range (say, less than 80 feet from the access point). However, one thing going for the jornada is that it has a 10.8V power pack. My WiFi CF cards drain my Zaurus' battery in an hour (3.7V) where the same card seems to last quite a while in my Jornada (I haven't done any scientific tests) - about two to four pips on HP's WinCE battery monitor in an hour on a fully-charged Jornada battery pack versus almost exactly two pips on the same charged-battery and machine without WiFi.

It should be quite easy to construct an external power pack containing 8 regular AAA or AA batteries to plug into the Jornada to probably double if not triple the run time of the machine. However, if you use NiMH AAA or AA batteries, you will need 10 of them, but the battery pack becomes rechargable then....

Just food for thought.
-Mark Gollahon

Colin Sauze wrote ..
> Simon wrote:
>
> >Just FYI:
> >This seems to be a good suggestion for the ones not being able to get
> their
> >hands on a Flashboard.
> >I'm doing some battery-uptime testing for myself at the moment, so i can
> see
> >how long my Jornada can playback MP3's.
> >I'm not done yet, but by downclocking the CPU only and turning the display
> >off I'm getting definitely a lot more playback-time (something like 30%
> I
> >think).
> >
> >Personally I don't think it'll be a problem to catch the press of the
> >suspend-button, it's most probably controlled by CE normally.
> >
> >Kind regards,
> >Simon
> >
> >
> >
> On a related note does anyone know how long the battery will last with
> a
> wireless pcmcia card running?
>
> I want to try and keep my jornada turned on, carry it around with me and
> have it make a noise whenever I get an IM or receive an email providing
> there's an available signal from an appropriate network.
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Received on Thu Feb 17 2005 - 07:20:08 EST