Daniel Willmann schrieb: > Hi, Hi! > On Fri, 29 May 2009 22:58:53 +0200 > Joerg Reisenweber <[email protected]> wrote: >> Last not least: probably a better battery management will have more >> positive effects on standby time than fixing #1024 in hw and using >> AT%sleep=4 all the time. First raw estimations seem to suggest >> there's an increase in standby time from maybe 60h with sleep2 to 75h >> with sleep4. If your standby time is shorter than these figures then >> even percentage of difference gets *smaller* (e.g. like 20h vs 21h = >> 5%, instead of 60/75 = 25%), due to savings from sleep4 becoming >> negligible compared to higher suspend consumption of whole system. > > I ran a battery consumption test on my #1024 fixed freerunner, the > results of which can be seen here: > http://totalueberwachung.de/blog/2009/06/03/freerunner-deep-sleep-standby-time > > I got close to 6 days worth of standby time (143h) which I found rather > impressive. The phone was not used at all for calls so the value > represents an upper limit, but I checked that the GSM modem was still > operational by calling the device at the end. I'm currently repeating > the test once more and will post an update once it's done, but it seems > we'll be in the 130-140h region again.
Wow - that seems pretty much to me. That would mean an average of 8.39mA current consumption given that the battery really has 1200mAh. This *is* little - the system standby current should be around 2-4mA so this leaves just 4-6mA for the modem. This is IMHO good. Currently on an unreworked GTA02 I see (last time I checked) about 15mA standby with additional peaks (presumably the modem wakeups). 8mA is again almost half of it which cannot be only due to the capacitor. So which software(-distribution/kernel) have you been running to do the test? I this is critical to know in order to see which devices e.g. were powered or not etc. If thos results can be reproduced then this really means a major step forward! 130-140h standby time is pretty much the same as you can expect from a WinMobile Smartphone or any other similar GSM/3G device (while the 3G usually eat more battery). > Regards, > Daniel Willmann Cheers nils faerber -- kernel concepts GbR Tel: +49-271-771091-12 Sieghuetter Hauptweg 48 Fax: +49-271-771091-19 D-57072 Siegen Mob: +49-176-21024535 http://www.kernelconcepts.de _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
