Does the powerbot 7070 come with a charger? I see the docking station in accessories for an additional purchase, but shouldn't that come with the device? I guess I dont understand ... i would think a charger should come with the device but I cant find any spec that says the vacuum comes with a charger, if they are going to bill me for the charger I probably won't be buying this as I feel charging the device is kind of a requirement for the purchase. Please let me know if a charger comes with the Samsung 7070 powerbot vacuum, thanks. ... View more