Just got mine and noticed the setup poster says you can insert the battery, plug it in, and turn it on right away. But I just want to point out the following from the Power Management pdf on HP's website: To prolong battery life and optimize the accuracy of battery charge displays, follow these recommendations: - If you are charging a new battery, charge it fully before turning on the computer. - Charge the battery until the battery light turns off. NOTE: If the computer is on while the battery is charging, the battery meter in the notification area may show 100 percent charge before the battery is fully charged. - Allow the battery to discharge below 5 percent of a full charge through normal use before charging it. Also I notice the power plug seems to need an additional push, beyond the "click" I seemed to notice, or else it can easily become unplugged. Sorry, the title should read: "How to charge a new battery". Moderator, please correct.