The power station worker, identified only as Dmitry K, is also accused of designing an electric carpet which would kill anyone who stepped on it.
The 30-year-old lured his victims by posting an advert on an internet website claiming he wanted to buy computer parts, detectives said.
Once at his house, he asked them to sit in an improvised electric chair before tying them up and hitting a button on his computer to activate the current.
After the victim was dead, he took the body to a forest and burned it.
Police only tracked the killer down to his house in in the city of
Yekaterinburg, in the Urals, after finding the remains of a 23-year-old student.
The man had been so badly burnt that officers were only able to identify him from dental records.
They also found fingerprint evidence which linked the victim to Dmitry K.
He has admitted the murder - but detectives suspect him of killing at least five other people.
Investigator Vladimir Davydov said: 'We are fairly sure that there were many more victims.
'He attacked this victim in his garage, tied him into his death chair and sent a huge electric charge through his body.'
Dmitry K told investigators he would admit other murders if they could find the bodies.
He also claimed he had designed a device which would remotely stop cars passing by his house - and then electrocute drivers when they stepped on his door mat.
He had been planing a machine to erase people’s memory with an electro-magnetic ray, he added.
CANNIBALS AND RELIGIOUS FANATICS
There have been a string of horrific killings in Russia in recent months.
In March, police arrested Olesya Mostovschikova, 27, for axing a woman to death before cooking and eating her.
The details of the case were horrific - but it was not an isolated incident.
In January, 16-year-old schoolgirl Karina Barduchyan was killed and cannibalised by a 21-year-old butcher and his florist friend in St Petersburg.
Yuri Mozhnov and Maxim Golovatskikh told officers they had cooked and eaten her with potatoes because they were hungry.
Last September in Yaroslavl, Satanists killed and ate Olga Pukhova, 15, and Anna Gerokhova, 16, after a ritualistic killing.
In the same month, police revealed they had arrested two Jehovah's Witnesses for murdering 13 people during a nine-month killing spree.
Claiming to be on a mission from God, Vladimir Gurianov, 44, and Elvira Egorycheva 46, hacked, shot and bludgeoned their victims in a case that left even hardened Russian detectives shocked.
They claimed to be on a mission from God.
written by WILL STEWART at the Daily Mail