Leave the laptop plugged in and if you remember run it off the battery once a month.
There may be a download on the Samsung site to enable you to limit the battery's charge to half. I remember one being available for the sammy netbook I bought for my daughter and a couple of Lenovo laptops I set up for friends.
Reading this posting as got me rather concerned, because does this now mean, that the manufacturer's are now telling us that there is a life-span to their products, and possibly a short one at that?.
On a personal note, I have had a number of 'non-serviceable' items, but on a little bit of investigation or experimenting, found that you could make them serviceable. One particular item is smoke detectors, with the non-serviceable battery. I have been able to change these units without further issues, it just meant removing the security tab, so exposing a battery, which may have failed well before time.
Was unaware of this trend of providing non-removable batteries in laptops. I will look out for this on any future purchases and avoid like the plague. It needs consumers to take a stand to stop manufacturers taking liberties like this.