In my daily usage I try to avoid as much as possible charging the N900 without need, which thanks to KP is not many times a week. However, I suspect that reswapping would cause a battery drain, so the best moment for me to do such a task would be when I plug the device to a wall charger, but not with USB connection as I would use the device for transferring files. Would it be possible to launch the swap cleaning process upon detection of wall charging?.