Beagle indexing when running on batteries

["Andrey Melentyev" <rikz yandex ru>]

Hello,

I see that in Beagle preferences there is an option to enable/disable
indexing when running on batteries. Can someone tell me, how do Beagle
know if the machine is on AC power or not? Does Beagle use HAL daemon
to get this info? If yes, what exactly variables from lshal are used?

Thanks in advance.