Fenceman Energiser B430. The Fenceman Energiser is a 9volt battery operated energiser that is highly portable and suitable for strip grazing and paddocks. The energiser has 2 modes of operation - High Power Mode and Battery Conserving Normal Mode. An on/ off switch and a low battery indicator have also been added. The B430 will power 3km of single line well insulated fencing with medium vegetation. All Fenceman energisers carry a 3 years warentee and feature built in lightening protection.