Does it hurt to leave my phone plugged in after it's finished charging?

Episode 1075 (1:08:34)

Tiff from Redding, PA

Tiff wants to know if it hurts the phone to keep it plugged in after it's done charging. Leo says it actually doesn't hurt it at all. Cellphones use Lithium Ion batteries and there's a limited number of full charge cycles. Keeping it plugged in when it's not being used preserves and improves the lifetime of the battery. It also has circuitry that prevents overcharging.