Question about laptop charging? Specifically Dell?

Cast

New member
I've looked around the internet but I'm wondering how sever my case is. Overnight (roughly 8 hours), I left my laptop on sleep mode and left the charger plugged in. Did this reduce my battery life at all and should I be worrying? I'm thinking that this is a minor case, but I need this to be answered. Also, my battery life is rouhly 7 hours long when it's at 100%. How does that compare to other laptops? In addition, should I be unplugging the charger from an AC adaptor as well or is just removing the plug from the charger to the laptop fine as is?

Thanks!
 
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