Source obtained from http://sourceforge.net/projects/wmacpi/files/.
2003 September 23 0.92
Fix a few more bugs, and include an option to allow the user to
specify how often to sample the ACPI data - some BIOSes disable
all interrupts while reading from the battery, which apparently
causes some interactivity issues. I have no idea why reading once
every three seconds (which is our default), but there've been some
complaints.