<p>You can buy a replacement battery for MacBooks. They’re easily replaced.</p>
<p>The CD drive might be fixable. Try some of the advice on Apple’s support pages. You could try resetting the PMU. There are fixes listed on this page: [Apple</a> Portables: Troubleshooting the slot load optical disc drive](<a href=“http://support.apple.com/kb/HT2801]Apple”>http://support.apple.com/kb/HT2801).</p>
<p>Of course, back up any file you want to keep, before you try to fix anything! Back it up onto something remote–a separate hard drive, for example.</p>