Battery consumption is a very real concern among jailbreakers, especially given the fact that certain jailbreak tweak configurations can add to the burden of keeping your phone alive throughout the day.
While most people simply glance at the Status Bar or visit the Battery preference pane in the Settings app to learn more about their battery usage, those who want a brief battery usage report every morning when they wake up might take an interest in a newly released and free jailbreak tweak dubbed DrainCheck by iOS developer Ginsu.