From Filipe Lourenso:
BatteryCare is software created to optimize the usage and performance of the modern laptop's battery. It monitors the battery's discharge cycles and helps increasing it's autonomy and improving its lifetime. Provides detailed battery information and monitors the battery discharge cycles. It includes CPU and Hard Disk temperature monitoring. Advanced features like automatically disabling in battery mode Windows Aero theme, demanding services, and the Windows Sidebar or Gadgets. It also contains a reliable statistical battery time calculation method.
What's new in this version:
Version 0.9.8.11 has fixed a critical bug which caused a crash when shutting down the program with Windows XP and improved tutorial on how to perform a battery calibration, available on the website.