Ive heard tales that you should charge the battery of a device like this for like 8 hours regardless of whether or not it says 100 percent charged when you first get it and you do the first charge. I dont know if this is true or not. Should I just keep it plugged in all night? or once it says 100 percent complete that means its done and good to go and the battery wont suffer shorten life due to you not overcharging it?