Comment 12 for bug 120549

I can confirm this for a logitech codless optical trackman , except i only have 14% battery on mine.
This battery level has been the same for at least a few versions of ubuntu. I am currently running hardy heron, on a IBM thinkpad X31.

There is an unfortunate downside to this minor issue: Since 14% is considered critical battery level, i get an annoying pop-up warning every time i plug in the trackball, and the gnome power manager applet constantly shows the battery level of the mouse instead of the battery-level of the laptop, making it effectively useless as a power-manager applet.

 tkrag@tkragX31:~ $ lsusb -s 002:002
 Bus 002 Device 002: ID 046d:c508 Logitech, Inc.

and the relevant output from hwinfo eems to be the following:

48: USB 00.0: 0000 Unclassified device
  [Created at usb.122]
  UDI: /org/freedesktop/Hal/devices/usb_device_46d_c508_noserial_if0
  Unique ID: hSuP.uYIOgYiMV63
  Parent ID: pBe4.D92PQaaYz03
  SysFS ID: /devices/pci0000:00/0000:00:1d.1/usb2/2-2/2-2:1.0
  SysFS BusID: 2-2:1.0
  Hardware Class: unknown
  Model: "Logitech USB Receiver"
  Hotplug: USB
  Vendor: usb 0x046d "Logitech Inc."
  Device: usb 0xc508 "USB Receiver"
  Revision: "15.00"
  Driver: "usbhid"
  Driver Modules: "usbhid"
  Device File: /dev/input/input10
  Speed: 1.5 Mbps
  Module Alias: "usb:v046DpC508d1500dc00dsc00dp00ic03isc01ip02"
  Driver Info #0:
    Driver Status: usbmouse is not active
    Driver Activation Cmd: "modprobe usbmouse"
  Driver Info #1:
    Driver Status: usbhid is active
    Driver Activation Cmd: "modprobe usbhid"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #51 (Hub)