Generate electricity by placing biters on treadmills. Biters can be caught with cage traps, or by placing an egg extractor on a buried biter nest. Biters get tired after running on the treadmill after which they need be revitalized, which could be hazardous. Warning, biters might escape!

updated for 2.0 : https://mods.factorio.com/mod/biter-power
all credits goto Stringweasel for the orginal mod