ELECTROCONVULSIVE THERAPY
The treatment of certain mental disorders by passing an electrical current directly through the brain. So with that in mind, can you kill a zombie’s brain with electricity?

The simple answer is that you can fry just about any organic matter to a crisp if you use enough electricity and a zombie’s body will react much in the same way as a human’s if it comes into contact with a high enough current (it will conduct the current and so will be held to the spot and shudder). The problem is that the current would have to be quite high as zombies will react to low-voltage shocks in much the same way they react to any pain (i.e. they won’t notice it).
So, why would you want to waste your electricity on such a highfalutin, complicated way of killing zombies when you’ve only got £4.72 on the meter and a pointy stick would do the job just as well? If you have access to the national grid then by all means use this method. Otherwise save your electricity for heating your Super Noodles; they taste horrible cold.