Outer Limits 4x4 Board

Hi. I have just bought a Toyota Hilux and am having problems with the battery draining in about a week if not started. The Battery has been replaced and still the same problem. It has one of those electronic body rust prevention setups. Do these use enough power to drain a fully charged battery in a week? I have started checking everything else that I can think of that will drain the battery but have never had anything to do with the rust protection setup.
Thanks
Raymond

Unlikely, it should only draw milliamps. If you want to rule it out disconnect the ERPS and see if the battery is still draining.