you dont want to do that my friend. yes we've all successfully moved the comm board with battery still attached one or the other time before but, i've managed to kill two comm boards in this manner.
desoldering just the ground battery cable(black) wont require quantum physics and would save you a lot of hassles as it shuts power of the board completely.

nb when you do desolder, use tape tape to hold the wire against the body of the battery so it dont touch anywhere as yo make your change.


i hope i aint too late
goodluck man!