Lenovo Ideapad U310 - battery problems

So I looked everywhere for an answer to this and had no luck. I am a student and use my U310 to study; usually, for an extended period. My concern is with the battery and recharge. Is it bad to leave it plugged 100% while I use it for several hours to study? I want to make sure I have properly dealing with this ultrabook and destroy the life of the battery. If I could take out easily, I would. But on this device casing makes it quite difficult to do on a semi-regular basis.

So basically what I want to know: is it better to leave it plugged in for several hours (5-7 hours) to 100% of load so I use it for study, or is it better to unplug once hits 100% and reconnect in necessary?
It is better to do than the other, or is a more harmful than the other? I would appreciate some clarification really, thank you!

@chellelin92,.

You can go there. The link below for "Lenovo Energy Management".

http://support.Lenovo.com/en_US/downloads/detail.page?docid=DS029488

Tags: Lenovo Notebooks

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