This is just my personal opinion (and you know what they say about opinions) but if you have electricity nearby and the job takes more than a few seconds then use a corded tool. Battery tools are handy, but they can't get the job done like a corded tool. Let's say your battery is getting low and you are in the middle of the job. What happens to the rpm of the bit? It starts going slower and then what happens. Your otherwise nice job gets ruined. Yes, you can switch the battery out but by the time you realize that something is wrong it's too late. A cord won't get in the way and besides you will find that if you mount the router on a table, you will never see the cord.