Does the phone or the charger determine when a battery is full? Or is the answer "neither"? Can the battery be damaged if left on the charger all night--or even several days? I've heard conflicting answers to these questions. The reason I'm asking (now) is I was shopping for a desktop dock and saw one that came with a charger that featured a "smart chip" that won't overcharge the battery. I personally haven't had any issues whether I'm plugged into a pc usb port with any old cord, plugged into a $1 store wall charger, or plugged into a 12V car adapter. Just looking for the truth.