Audioquest DBS System

I have been thinking about trying out some of the Audioquest Columbia xlrs for my CD player. To those you have the Dbs system in your cables- How long do the batteries last, and when or if they die do you have to buy a whole new battery Pack? if so how much is the replacement packs? Thanks
I've used Columbia RCAs for the past three years or so and never had to change the batteries; I do check them occasionally.  There is nothing you need to do to turn the DBS "on"; if the batteries aren't dead, it's working.