BatteryMon is a battery monitoring software solution. It has been designed as an easy-to-use Windows based application that allows users to monitor the performance of laptop batteries and uninterruptible power supplies (UPS).
# Graphically see the charge / discharge rate
# Diagnose problem battery cells with detailed statistics
# Compare and measure your batteries' performance with expected discharge rates
# See the critical discharge point for your batteries
# Uniquely identify battery packs for tracking purposes or system inventories
# Log the performance of a battery for later reference
# See the status of each individual battery pack, when multiple batteries are in use

Compatibility
Any laptop battery or UPS that complies with the Windows, Advanced Configuration and Power Interface (ACPI) specification should be able to report information to BatteryMon. Note that only Windows 98, ME, 2000 and XP support this interface. Windows95 and NT are not supported. Older PCs may also have a problem if their BIOS does not support ACPI. Some features may not be supported by some battery types, typically they will report only partial information in this case. It has been also been noted that several UPS manufacturers are not providing compliant device drivers.