Generally, just use it. Just don't keep the mains Power on when the laptop is off. I did that and the battery stopped holding its charge. So in order to keep charge, turn mains power off when laptop is off. Also, msi says for my new laptop that every 3 months to completely drain the battery. This is apparently so you get the full charge of the battery. I personally don't care about the full charge. So generally, just switch off mains when laptop is off.
