libhal_device_get_property_int
libhal_device_get_property_int (hal_ctx, udi, key, &error));
dbus_int32_t value = libhal_device_get_property_int (hal_ctx, udi, key, &error);
remaining_percentage = libhal_device_get_property_int(ctx, udi,
reporting_lastfull = libhal_device_get_property_int(ctx, udi,
design_voltage = libhal_device_get_property_int(ctx, udi,
dbus_int32_t libhal_device_get_property_int (LibHalContext *ctx,