Killerwatt

Killerwatts are Slayer monsters that require level 37 Slayer to kill. Players must wear insulated boots to fight them, otherwise they will get hit for 14 damage by the thunderclouds inside the area. Note that as soon as you select it as an attack target, it will run towards you and attack you as if it was aggressive, sometimes attacking you first.

Warning: Killerwatts are much more dangerous than what their combat level may suggest; they can attack very frequently, and are very accurate. Only fight them when wearing armour that has a high magic defence bonus.

The name is a play on "kilowatt", a unit of power, with the word "killer" included to imply its hostility.

Location
Killerwatts can be found on the Killerwatt plane, which is found by stepping through a portal on the top floor of Draynor Manor.

Note that the killerwatt plane is filled with flashing lights, so it is advised that anyone with eye problems or epilepsy should either play in low detail or not go in there at all.

In the Enlightened Journey quest, it was revealed by the balloon travelling screen that killerwatts also inhabit clouds. However, players cannot engage them in battle here.

Strengths and weaknesses
Killerwatts use both ranged and melee, and can hit very rapidly. On distance they will always attack with ranged so if you can, use the Protect from Missiles prayer and pack several vials of Prayer potion. Wearing dragonhide armour can help resist some of the Melee attacks. As they attack extremely rapidly, eating while killing them is not recommended as the killerwatt can hit more than you can eat.

Slayers with a combat level under 100 generally change, skip or remove this monster.

100% Drop

 * Ashes

Other

 * 11 or 44 or 200 coins
 * 3 cannonballs
 * 2 fire orb
 * 4 soda ash
 * Nature talisman
 * 5 rune javelin

Magic Staves

 * Staff of fire
 * Staff of air
 * Fire battlestaff
 * Air battlestaff
 * Mystic fire staff

Gems

 * Uncut sapphire
 * Uncut emerald
 * Uncut ruby
 * Uncut diamond

Runes

 * 2 Steam runes
 * 5 or 17 air runes
 * 18 or 45 fire runes
 * 4 chaos runes
 * 8 or 37 nature runes
 * 2 death runes

Herbs

 * Grimy guam
 * Grimy marrentill
 * Grimy tarromin
 * Grimy harralander
 * Grimy irit
 * Grimy ranarr
 * Grimy avantoe
 * Grimy lantadyme
 * Grimy dwarf weed

Charms

 * Gold charm
 * Crimson charm
 * Green charm
 * Blue charm