...but the Logitech Wireless Keyboard and Mice have software which pops up "Battery low" and "Battery Critical" warnings, when levels get low.
Open your Control Panel and double click on the Mouse/Keyboard icons. If it's anything similar, it might hopefully have the special "Cordless" type tabs, which allow it to check and display the battery level.
I have an HP Pavilion m7580n PC with a wireless keyboard and mouse. The batteries included with the new system didn't last long, however when replaced with a complete fresh set, they seem to be hanging in there. I have a question for anyone who might know...Is there a small utility out there that will monitor the battery levels of the keyboard and/or mouse in this wireless setup?