<p>if you want a discrete card, you can buy an extra battery, get a high-capacity one (ie 8 or 12-cell) with the computer, or get a Macbook Pro.</p>
<p>i doubt you’ll be using your computer in ever class. it will also be on standby when your not using it. if you have a lunch break or something, you can just go somewhere with an outlet if you need to.</p>