New Battery or Something Worse?

[ohsnaphappy]

Just got a MBP back from one of my employees. It's a 2011. Battery lasted about one hour when I have it to her. She used her smaller MBP charger with mine and then told me the battery stopped charging. So I'm wondering if I can just buy a new battery, or is something actually fried? Just to repeat, she used her charger with my MBP and then claimed the battery disappeared. I have the MBP with me now, and it has an X in the battery icon. In the system profiler, no battery is listed...

 

[maflynn]

Its probably the battery. As long as her charger fit the MBP's port, there would be no harm, a lower wattage power brick will charge the MBP longer that's all (I'm assuming when you say smaller you mean power supply wattage).

 

[BrianBaughn]

A battery down to an hour is definitely on the cusp of dying.

 

[Fishrrman]

Get a new battery AND a new charger of appropriate size.

Battery shouldn't be difficult to change yourself.
Check ifixit.com for a replacement guide.