Karam - Ok, I edit /opt/batterypatch/profiles/overclock-new and set max freq to 900 and after reboot n900 load my old profile (I set it before installing batterypatch). When I type in terminal: "echo 1000 >> /proc/sys/vm/vfs_cache_pressure" lock it and type "cat /proc/sys/vm/vfs_cache_pressure" - batterypatch is working, but max cpu freq is 805 again :/

EDIT: It's working I edit "/usr/share/kernel-power-settings/overclock" too, after reboot I have 500-900MHz clock with batterypatch.

It's my testing config. Working fine, but not much tested under heavy load (this voltage is from ideal profile, I was tested it on 500-900 clock (with smartreflex) before and it was fully stable, but now dsp is higher). Any sugestions for improvments this config ?
EDIT2: It's stable and battery life is really good for me.
I change "Samping_rate" to 150000 and "up_treshold" to 75 (like in "ideal" profile) - better performance for me, but I don't know how much is difference between this in battery life, but working faster on 150000 and 75.

Battery life: I disconnet n900 from charger 11hrs ago (at 8.00 am). Now conky shows 50% of battery - wifi always connected to AP, some internet browsing, some music on headphones, 2calls and about 7hours kadu in backgroud.

Thanks for batterypatch, it;s really good work, after set ideal profile voltages and 500-900clock .

PS: Sorry for my english.