The idea is easy, surround something you want tp protect with a swarm of low energy bots that lie in hibernation. The question is, how can a swarm of low energy bot fight most effectively when it has not necessarily to care for self preservation?
This minefields are my second approach for battery, gardener bots defensive mechnism to protect their veggie,
as my first concept of building a fortresslike multibot caused to much secondary problems and was too hard to realize.