Hi, On Thu, 2008-02-14 at 10:38 +0100, ext Frantisek Dufka wrote: > Igor Stoppa wrote: > > - n800 and n810 have the same battery capacity, but due to few hw > > bugfixes, the projected idle time is not the same (bear in mind that > > this is much more than what is advertised since the advertisement takes > > into account also possible variances in the components batches and > > anyway it's unlikely that the tablet stays unused for so long ;) > > I actually got one spare N810 (thanks Quim :-) so I hope I will make > similar tests with it until I find better use for it or I break my > primary one. If anyone here is interested in some specific test I can > run, let me know. I don't have any precise measuring tools so it must be > done in software. I think someone done something listenin to d-bus > events and reporting battery percentage. I plan to test at least > efficiency of mp3 playback with CPU/DSP at 330/220 vs 400/165. cool > > 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. > > Note that this is measured with no connection/extra sw installed or > > applications running. > > > The default setting for new device is glowing blue led when device is in > standby, are those 27 days measured with glowing blue led? No, that's the wow effect :-D > Do the LEDs > in N810 still eat CPU power when blinking? No, there is a dedicated, programmable chip, nickname NJoy, which takes care of it. A similar one is in the keyboard controlled and provides backlighting. I posted some time ago a link to the public (and complete!) datasheet on ITT, in the easter egg thread, iirc. It's connected over i2c so it should be quite easy to play with it. A nice experiment would be to write a userspace tool which can generate the program sequence to dump to the njoy for obtaining user-defined patterns. -- Cheers, Igor --- Igor Stoppa Next Generation Software Nokia Devices R&D - Helsinki
