Thames Valley Police and Hampshire and Isle of Wight Constabulary are launching the rollout of new Taser devices.
Over the course of the next 12 months, the Taser 7 device will replace all the force's current X2 models.
The device is an evolution of its predecessor, enhancing the safety of our officers and the public, with two cartridge types for use depending on the proximity of a person.
Assistant Chief Constable Rob France, responsible for the two forces' Joint Operations Unit, said: "Since the Home Office approved the T7, following rigorous testing, we have been looking into introducing this to replace the current X2 devices our people use.
"Ensuring the safety of all in our communities, in particular the most vulnerable, is a key priority, and Taser has an important part to play in this.
"All Taser trained officers go through a comprehensive training programme, and continual refresher training, to ensure it is being used lawfully and appropriately.
"Of course, we will always do all we can to resolve a situation without needing to use force; however, there are occasions when we must do so for the safety of the public, to ensure the safety of ourselves, or for the safety of the person involved in the incident."
ACC France added: "The use of police tactics, including any use of Taser, whether it is discharged or only used as a visual deterrent, is closely scrutinised.
"The trust and confidence of those we serve is extremely important to us."