Notes

You must have level 37 Slayer and be wearing Insulated boots to kill this monster. The Edgeville dungeon master generally assigns Killerwatts.
Players suffering from epilepsy should either use High Detail with "Flickering Effects" set to OFF or not enter the plane at all. Speak to a Slayer master to have your task changed if needed. When killed as a slayer assignment, you'll receive 51 slayer XP per kill.

Tactics

First off, Insulated boots is a must. Decent food and prayer level. Metal armour is useful because Killerwatts attack with Ranged, Mage, and Melee. Protect from Ranged from a distance and they can not hit you until you get close enough to melee. Dragonhide and Metal armour is advised

Examine

An angry electrical shock!; A ball of Electrical energy

Top Drops

Air battlestaff, Fire battlestaff, Mystic fire staff, Starved ancient effigy

Drops

Impious ashes (100%), Coins (11-200), Air rune (5-17), Fire rune (18-45), Steam rune (2), Chaos rune (4), Death rune, Nature rune (2-37), Nature talisman, Rune javelin (5), Grimy herbs, Cannonball (3), Staff of fire, Staff of Air, Fire orb (2), Soda ash (3-4), Gold charm, Green charm, Crimson charm, Blue charm