Ann, a user, has brought her laptop in for service. She reports that her battery is at 100%,
but whenever it is unplugged it immediately shuts down. Which of the following should the
technician do?

A.
Replace the battery

B.
Change power settings to balanced

C.
Replace the power adapter

D.
Enable APM in the BIOS

Explanation:
http://www.dummies.com/how-to/content/how-to-replace-your-laptop-battery.html