I use a logitech g7 gaming mouse and it does show on the system tray when the batteries are low. And you can also, through the setup, set the percentage of when you want to be notified that the batteries would need to be replaced. Also, some of my other Logitech devices, when you open up the setup through control panel as well as from system tray, there is a tab which lets you know if the battery life is good, low, needs to be recharged. I use the G7 as well as the MX1000 from logitech. I think my previous logitech devices did as well. Is that what your talking about?
