The only use I see of a power conditioner is for example that it can apply battery backup to a component like a computer that is collecting data in real-time (like in a laboratory) during a short power outage (less than an hour). However, during a long power outage the battery would become rendered useless. So that feature is even limited.
A power conditioner will not protect your HT equipment against a destructive surge either. For that you would need a whole house surge protector that will shunt the surge to earth ground before it enters the home. One that is installed on the outside line by the power company or inside at the panel box.
