I had to add haldaemon to the usb group to make it support reporting the battery percentage of my mouse's battery. It's a Logitech MX-1000. I think it should be the default, so people don't need to investigate for 3 hours to figure out how to make HAL support their mice. Reproducible: Always Steps to Reproduce:
Which version of hal is this in regards to? This is in 0.5.4 as of the 17th of October. Reopen if this isn't fixed for you.