Should I use it more on AC power

I use my Macbook quite extensively. Its been 2 months now and my battery count is 35. I think that's too much.
I have to use my Macbook for 6-8 hours daily as I don't have a desktop.
So what all of you suggest. Should I use it on AC power for all these times?

You should use the AC adaptor whenever possible. No harm is done to the battery nor will it affect the cycle count. See the following:
About Batteries in Modern Apple Laptops
Apple - Batteries - Notebooks
Extending the Life of Your Laptop Battery
Apple - Batteries
Determining Battery Cycle Count
Calibrating your computer's battery for best performance
Battery University

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