Battery life new 15 MacBook Pro. Two questions

Hi, I've been working with the new MacBook Pro for two weeks and I've found the battery life impressive. It let me work the whole morning (around five hours with a couple of ten minutes breaks, with wireless and half bright). I'd like to maintain this performance as longer as possible, then my first question is:
1. When I get back home I usually plug in the laptop to electricity to recharge the battery while I keep working in the afternoon for several hours, should I unplug it when the battery is full? Is a good thing to keep the laptop always plugged in?
My second question has to do with the fact that I'm a bit distracted, then,
2. Does this laptop have any way to let me know that there are, for instance, only ten minutes left before it go to sleep? (an acustic signal, a warning...).
Thanks.

 

yes, keep it plugged in, its allright, your battery will stop charging once it hits 100% and will only start charging again when the level drop to about 90%.
avoid charging the battery when it is hot. like around 40 degrees hot. dont completely discharge the batter too often. preferably less than 2 to 4 times per year.

there will be a low battery warning when it gets to low. and there is another "battery VERY low" warning again when it reach like 3%. this will be in a form of a pop-up dialog.

 

Never unplug your battery. It will throttle the CPU. The battery will simply stop charging once it's charged up full.

And yes, there are actually two signals telling you the battery is low.
There are pop-ups telling you to save your work and either shut down the computer or plug it.

 

Many thanks for your replies. This forum really works!