Nexus One Battery Drain

If you are having a problem with your Nexus One draining battery too faster after Gingerbread OS updated, take a look at the wifi settings.

Navigate to:
wireless & networks
wifi settings
advanced
wifi sleep policy

Setting Wi-Fi to "never sleep" or "sleep when screen turns off" should solve the problem.

This forum thread has further explanations:
http://www.nexusoneforum.net/forum/nexus-one-tech-issues-bug-reports/11528-android-os-drains-battery.html