Charge pump for EMG's

[paulyy]

I know this isn't a pedal question but was wondering if I could use this for EMG pickups. My friend has been wiring his EMGs at 18V for years. So I know the pickups can take it. I was just wondering if anyone has tried this. It seem like a smart move as apposed to using two 9Vs. The only draw back I think would be that the one 9V hooked up to the charge pump would kill the life of the battery quicker. I'm going to use Madbeans Road Rage (older version) to try and do this.
Any thought anyone. Thanks.