Comment 1 for bug 1195840

Same issue with the Logitech K810 keyboard:

$ upower -d
...
Device: /org/freedesktop/UPower/devices/battery_hid_00o1fo20o4do96o8b_battery
  native-path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/bluetooth/hci0/hci0:34/0005:046D:B319.0001/power_supply/hid-00:1f:20:4d:96:8b-battery
  model: Logitech K810
  power supply: no
  updated: Fri Jun 28 11:45:44 2013 (31 seconds ago)
  has history: yes
  has statistics: yes
  battery
    present: yes
    rechargeable: yes
    state: discharging
    energy: 0 Wh
    energy-empty: 0 Wh
    energy-full: 0 Wh
    energy-full-design: 0 Wh
    energy-rate: 0 W
    percentage: 55%
    capacity: 100%
...