Don't know if you care, but thought I'd share my current battery patch set-up. The repo version used voltages that my N900 didn't like so I use my own customised ideal config for under-clock. This is essentially, the standard Ideal, with 250 and 500 only and smart reflex (with the task stopping that batterypatch brings). My overclock profile is also my own custom config as I tend to leave my N900 clocked at 850 as I like the way it runs so can't use smart reflex. With this configuration I am getting decent battery life (at 85% after 4 hours moderate use) and no random reboots.

My next step is to get a QBW setup so I can clock to 850 (or more) at a button press and then leave my overclock profile at a lower clock speed with smart reflex. Then I can clock my phone when I need it fast and not worry about dropping the clock speed again as once I lock and unlock my phone, I'm at the lower clock speed with smart reflex