Victorian police officers will soon be allowed to carry tasers, in a move that brings Victoria into line with New South Wales, Queensland and Western Australia.

But unlike other states, Victorian officers will use a new type of taser which can fire a second electric shock.

Civil liberties groups are alarmed, saying the new weapons should have been trialed first.

The weapons are being introduced after a one-year trial in Bendigo and Morwell. But in that trial, police used a different type of taser.

The new one has never been seen or used before in Australia and unlike previous models the new one can fire two shots without reloading.

Officers will be trained to use the new weapons, which have a five-second cut off and a video camera that only operates after the trigger has been pulled.

Deputy Police Commissioner Kieran Walshe says just the mere presence of the device has prevented the escalation of some situations, but he admits this new version was put through a trial.

"No the x2 was not available for trial at that point in time," he said.

'"But there is the opportunity for us to use this in the new environment."

Spencer Zifcat from Liberty Victoria says that is extraordinary.

"Consequently the potential damage to individuals may be greater than those that were used previously," he said.

"I'm not confident that the Victoria Police will train every policeman on the beat to the extent necessary for them to exercise the skill and control that are appropriate for the use of very dangerous weapons."

Once further funding is secured from the State Government, police say it will take two to three years to roll-out the new tasers.

The Ballarat police station will be one of the first two in the state to be equipped with the new stun guns.

Acting Superintendent Bruce Thomas says the station will be issued with about 30 of the devices, from mid-year.

"What it actually does is give us another tactical option," he said.

"We can escalate or de-escalate, as the option arises and we can assess the threat, or counter the threat, with an appropriate option."

Geelong police will also receive stun guns.