Why is my battery % getting lower even when my power adapter is connected

Hi!
Got my new macbook pro few months back. At first I loaded battery to full and totally empty about 3 times. Currently it has 14 cycle counts. I mainly use my computer with power adapter plugged in. When I charge it to 100% then afther time passes it goes 99%, 98%, 97%... but all this time my power adapter is plugged in. When I unplug it and run it on battery and then plug power adapter in again and when it reached 100% then again afther time passes and with power adapter still plugged in, it starts to go from 100% to 99..98..97%. At this time I usually unplug it, run it on battery and then again plug it in. Whatever the % when power adapter is plugged in (100%, 99%, 98%, 97%), Time view shows always "charged". I haven't let it drop more that 97% before I unplug it, run it on battery for a while and then plug it in again.
If I let it drop more than 97% (although power adapter is plugged in) will it eventually drop to 0% and time view still shows "charged" ?
All this time I have about 3 word documents open that I'm working on, 1 pdf document open and safari with different dictionaries all at once and time afther time I shearch the internet.
Is that normal with these applications running or not?
Why is that?
My older computer, macbook, when it's power adapter was plugged in, it always showed 100%.
Any word of advice?

That is normal behavior. The power will drop several percent before the charge function kicks in. If you leave it on power you'll notice it start to charge somewhere around 96% maybe 95%.
You can just leave it plugged in and it'll take care of itself.
Regards,
Captfred

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