Dnt worry abt overcharging if ur laptop was made in z past 5 yrs.Laptop from around 2012 onwards hv built-in switches that disconnects z battery n draws power directly from ur wall outlets. So ur fine 2 use ur pc plug-in. I would however recommend using it on battery once a week and also discharging it to about 20% every month or two, 4 a good battery health.