Current upower (0.9.20+ git fixes) is capable of monitoring logitech wireless devices like keyboard, mouse, trackball.

Example:
Device: /org/freedesktop/UPower/devices/mouse_0003o046DoC52Bx00BC
  native-path:          /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1:1.2/0003:046D:C52B.00BB/0003:046D:C52B.00BC
  vendor:               Logitech, Inc.
  model:                M570
  power supply:         no
  updated:              Tue Mar 26 20:09:55 2013 (12 seconds ago)
  has history:          yes
  has statistics:       no
  mouse
    present:             yes
    rechargeable:        yes
    state:               discharging
    percentage:          50%



Unfortunately solid doesn't recognize such devices as devices with battery.


Reproducible: Always




Simple patch for kdelibs makes device recognizable:

--- solid/solid/backends/upower/upowerdevice.cpp        2013-03-01 07:26:14.555774261 +0100
+++ solid/solid/backends/upower/upowerdevice.cpp  2013-03-26 20:13:35.925180209 +0100
@@ -83,7 +83,7 @@
         case Solid::DeviceInterface::GenericInterface:
             return true;
         case Solid::DeviceInterface::Battery:
-            return (uptype == 2 || uptype == 3);
+            return (uptype == 2 || uptype == 3 || uptype == 5 || uptype == 6);
         case Solid::DeviceInterface::AcAdapter:
             return (uptype == 1);
         default:

[arekm@t400 ~]$ solid-hardware details '/org/freedesktop/UPower/devices/mouse_0003o046DoC52Bx00BC'
udi = '/org/freedesktop/UPower/devices/mouse_0003o046DoC52Bx00BC'
  parent = '/org/freedesktop/UPower'  (string)
  vendor = 'Logitech, Inc.'  (string)
  product = 'M570'  (string)
  description = 'Unknown Battery'  (string)
  Battery.plugged = true  (bool)
  Battery.type = 'MouseBattery'  (0x4)  (enum)
  Battery.chargePercent = 50  (0x32)  (int)
  Battery.rechargeable = true  (bool)
  Battery.chargeState = 'Discharging'  (0x2)  (enum)