Q&A: Is it possible to overcharge a laptop's battery?

Q: Is it possible to overcharge a laptop? —James Maxim Cuba, NY

A:Laptops we've tested have "smart chargers" that monitor the battery level and stop charging when it's full. What's more, it's good practice to keep your laptop connected to its charger when possible. Laptop processors usually slow down when running on battery power to extend the battery time, cutting performance.

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