So, for the last 8 months (since I bought it), my N900 has never lasted more than 3-4 hours and would drain even when powered off. It was basically always plugged in and onlyused for hacking or playing tunes in the car. I became accustomed to it being a nice pocket heater.

The other day when i pocketed it it wasn't warm. I thought it had died. To my surprise, it was still on and had a full battery. Then I left it in the car for ~6 hours and it still had 70% charge left.

WTF, it has healed itself! I'm getting 8+ hours per charge.

Same old batteries, latest CSSU, overclocked, dev & test repos enabled. All hardware enabled. Not exactly optimized for battery life.

I don't get it but I'm glad its staying alive all day.