Samsung SCH-A610

I have had the 610 phone for about 6months. I love it. I just purchased data pilot, so I can get free ringtones and stuff. Anyway... My question is how do you charge your 610? How long? (Till the green light on the charger goes off?) Do you run the whole battery down and then charge it? Or, Do you frequently charge it without running the battery down? Is it possible to overcharge it?

I have had many problems with the 610 battery in the past and I had to get new ones from verizon. I ususally run it all the way down and then charge it. Is this correct?

Thanks for taking the time to help me!