Battery life & case design

[George Brooke]

These kind of devices produce that voltage in direct sunlight - but
only if there is no load connected (open circuit voltage) - the
connection to the device will pull the voltage down to circ. 5V. This
is the same as with the larger panels - a 12V panel will produce 20V
open circuit.

solar.george

On Wed, 2 Jul 2008 00:34:05 +0200
"Francesco Cat" <heartcollector87 at gmail.com> wrote:

> FR only accepts 100 or 500 mA current I think. So yes, it will be
> "powered" by it in the sense that the FR battery will have a longer
> life; but it should not be enought i think because the FR seems to
> need more than 100 mA and I don't think it will accept something like
> 250mA. It's 500 or 100.
> 
> BTW: 6.58 Volts??? Strange... It should provide 5Volts to simulate a
> USB... 2008/7/2 Diego Fdez. Durán <diego at goedi.net>:
> > El mar, 01-07-2008 a las 13:22 -0700, steve escribió:
> >> A deeper back cover is an option. The cad files are open. I also
> >> thought of an external battery pack
> >
> > What about this:
> > http://www.thinkgeek.com/gadgets/travelpower/7d34/ ?
> >
> > The specs says: Output power: 6.58 Volts - 320 mA (max) in direct
> > sunlight. Can it power the FreeRunner (power no just charge) ?
> >
> >
> >> ( maddogg sent me some stuff on it). Lots of ideas, too little time
> >>
> >> Steve
> >>
> >> -----Original Message-----
> >> From: community-bounces at lists.openmoko.org
> >> [mailto:community-bounces at lists.openmoko.org] On Behalf Of
> >> jonathan at topnoc.co.uk
> >> Sent: Tuesday, July 01, 2008 7:17 AM
> >> To: community at lists.openmoko.org
> >> Subject: Re: Battery life & case design
> >>
> >> Mikko Rauhala wrote:
> >> > ti, 2008-07-01 kello 14:35 +0200, Arne Zachlod kirjoitti:
> >> >> Im not sure, but I think with an even thicker phone there will
> >> >> be more no-geeks who dont care about the freeness who wont buy
> >> >> the phone only because its thick and heavy (and such a phone
> >> >> would be heavy).
> >> >
> >> > Actually reading the text you would have noticed he was
> >> > suggesting for someone (maybe Openmoko, maybe not) to produce a
> >> > large battery back as an optional accessory, so your criticism
> >> > misses the point entirely.
> >> >
> >> > For myself, I would be at least somewhat interested (depending
> >> > on bang per buck, of course; it's not a must-have for me), for
> >> > largely the reasons the OP mentioned. That is, simply for
> >> > getting to have more of it on more of the time doing useful
> >> > stuff.
> >> >
> >> > Power management is obviously important regardless, as is getting
> >> > decent standby time with the default battery. (If anyone would
> >> > like to offer a short summary to the community on how cpufreq
> >> > and suspend are progressing, that would be interesting.)
> >> >
> >>
> >> Thankyou, that is exactly what I was suggesting.   For instance, I
> >> was pretty
> >> excited over the ideas for the mybot program (is that what its
> >> called?) having a phone that alters its behaviour based on GPS and
> >> where you are.... I'd like to take that idea further and include
> >> WIFI so the phone also knows where it is based on what SSIDs it
> >> can find.... but can you imagine how long the phone would last
> >> with GPS and WIFI turned on??  kind of makes the idea a no go.
> >> Which is a shame as such functionality really goes a long way to
> >> make the phone a transparent and intelligent technology which
> >> you'd quickly be lost without... also its something that most
> >> other if all other phones do not do....
> >>
> >> So in short if there is anyone who has the means to mass produce a
> >> new deeper back cover for the phone so we can have a large battery
> >> in it then I think it would be in our interest to pursue that.
> >> I'm sure as time goes on there will be many other great software
> >> ideas for the openmoko/gta02 that will require the goodies to be
> >> switched on at all times.
> >>
> >> I've had a gta02 for a few days now. It really interested me as a
> >> platform for my various codings.  My old mobile was a P.O.S so I
> >> started using the gta02 as a phone straight away (which is fine
> >> with some tweaks).  However, already I have the habbit of getting
> >> to work and plugging the gta02 into my PC's USB port.... thus
> >> whenever I leave the office for a while I usually leave my phone
> >> behind which completely defeats the idea of a mobile :-)
> >>
> >> Regards,
> >>
> >> Jon
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Openmoko community mailing list
> >> community at lists.openmoko.org
> >> http://lists.openmoko.org/mailman/listinfo/community
> >>
> >>
> >> _______________________________________________
> >> Openmoko community mailing list
> >> community at lists.openmoko.org
> >> http://lists.openmoko.org/mailman/listinfo/community
> > --
> > Diego Fdez. Durán <diego at goedi.net> | http://www.goedi.net
> > GPG : 925C 9A21 7A11 3B13 6E43 50DB F579 D119 90D2 66BB
> >
> >
> > _______________________________________________
> > Openmoko community mailing list
> > community at lists.openmoko.org
> > http://lists.openmoko.org/mailman/listinfo/community
> >
> >
> 
> _______________________________________________
> Openmoko community mailing list
> community at lists.openmoko.org
> http://lists.openmoko.org/mailman/listinfo/community
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://lists.openmoko.org/pipermail/community/attachments/20080702/627bffb8/attachment.pgp