Is it OK to Keep my Smartphone Plugged in and Charging?

Episode 1575 (1:41:08)

Richard from West LA, CA
Lithium-ion battery

Richard wants to know if keeping his laptop and smartphone plugged in all the time will damage it. Leo says that there is great debate about it. It's not really bad to keep them plugged in at all. What's worse would be completely discharging or overheating them. Lithium-ion batteries also have circuitry designed to keep from overcharging. Check out Battery University for details on the life of batteries.