On Mon, 2008-02-18 at 12:47 +0200, Eero Tamminen wrote: > Hi, > > ext Neil MacLeod wrote: > > Igor Stoppa wrote: > >>>>>> n800: 18 days > >>>>>> n810: 27 days > >>>>> Impressive, any details where the savings were done? Is this strictly HW > >>>>> related and the n800 has same OS2008 version as N810? > >>>> it's both hw and sw; the sw part is about fixing wrong settings in muxing, > >>>> pullup&pulldown and disabling voltage regulators when not in use or OMAP > >>>> is in retention. > >>> Just to confirm, these 18 days are already on N800 with OS2008 and with > >>> those sw issues fixed? > >> I don't remember if i checked exactly the sw version that is public atm > >> but if it wasn't then it was close enough. > > > > I can't imagine those fixes are in the current software, or anything close > > to them as a few weeks ago I performed an idle run-down test on an N800 with > > 2.2007.50-2 (a freshly flashed device with no configuration changes whatsoever, > > I.e. you didn't restore a backup, configure a phone nor WLAN? > > > > so essentially a factory fresh install with a fully charged battery). After 12 > > days and 2 hours[1] the low battery alarm began to sound - that is just 2/3rds > > of what you are saying is possible so why such a large discrepancy > > Igor, the 18 day number, is that until the device (is calculated to) > shut itself down, or until there's the low battery warning? heh, first of all i don't see much difference when we talk in terms of days, considering that the notification itself with bells and whistles would probably eat up a good deal of idling time. Then, I intentionally let out all the magic used in battery prediction and user management (what you see from the battery UI is not always what you get, but rather what you _should_ think =) It's a basic calculation done with battery capacity and average idle current over a relatively short time (tens of minutes). > > could my 9 month old N800 battery really have lost 1/3rd of it's > > capacity? > > And you verified that it really was the original N800 battery and > charger? (I sometimes use the 770 ones, but I think its battery > has smaller capacity) > > > > Or can this difference really be down to component variance (the tested N800 > > is from March 2007)? > > > > 1. https://bugs.maemo.org/show_bug.cgi?id=2602#c20 > > - Eero -- Cheers, Igor --- Igor Stoppa Next Generation Software Nokia Devices R&D - Helsinki
