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Re: powerbook 15" 1Ghz question ...

On Don, 2003-04-17 at 13:58, Michael Flaig wrote:
> On Wed, Apr 16, 2003 at 06:48:24PM +0200, Michel Dänzer wrote:
> > On Mit, 2003-04-16 at 16:16, Michael Flaig wrote:
> > > How long can you work with your powerbook on battery power?
> > > Yes, i know, this depends on what you do with the Powerbook, right. 
> > > But what are your experiences?
> > >   - on normal working (vi, ssh, email, web, irc, etc.)
> > 
> > About three hours.
> this is not really much :-( 
> do you use your powerbook with full display brightness?

No, I'm running at fblevel 7 all the time.

> ... i had expected more than 4 hrs, because I can get 4 hrs with 1 battery 
> in my pismo which only has 45 Wh capacity and the TiBook has 61 Whrs 
> (wasn't this 68 Wh in the first TiBooks???)
> So is this energy consumption a problem of the G4 processor or would you 
> call the Radeon the main power consumer?

I guess both are drawing quite a bit of juice, as well as other
components. The new dynamic power management code helps a bit for the M9

> i never read about the posibility to place a second battery in the
> powerbook... using 2 batteries is what I love on my pismo :-)

There's definitely no room left in a TiBook for a second battery. You
can hotswap batteries though.

> So I wonder myself why Benjamin gets around 4 hrs and you only get 3 ...

Probably because I haven't done anything special except clocking down
the CPU.

> > >   - and on heavy cpu using (compiling, etc.) 
> > 
> > Haven't really measured this, but I guess about two hours.
> so the 5 hrs which Apple says, could only be reached with display turned 
> off :-(

Mac OS may still be slightly better at saving power than Linux, but even
so I doubt 5 hours can be achieved doing anything useful in Mac OS...

Earthling Michel Dänzer   \  Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast  \     http://svcs.affero.net/rm.php?r=daenzer

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