Bacardi,
Understand that the Ground Lifter just does that. You could do the same thing by cutting of the ground pin on the plug going into the wall. I don't really know whether lifting the ground on the PowerCell would adversely affect it, however.
But I do know that most systems sound better with only one component grounded to the ac. This is especially true of the H-Cat components and is why I was so happy to get a good sounding and easy way to lift all grounds on grounded components in my system except the line stage. If anyone is happy using the Levtron cheater in its standard, $.89, form, I am happy for them.