When to charge iPOD Nano


I was wondering if pluging my nano in 3-4 times a day for 10 min at a time will hurt the battery life. If so should I just wait till the battery is low to plugin.

Wait 'till the battery is completely drained, then charge it fully. Wash, rinse, repeat.

EDIT: You know all those people who bitched about the fact that their iPod batteries were crapping out, and sued Apple? I'm not one of them. My original 5 GB iPod ONLY NOW is beginning to show signs of not holding a decent charge because of the way I treat it.