Bought a laptop off my friend for $100 so he can get rid of it since he no longer uses it, and he can use the money to get more fans for his desktop to help that with it's overheating issue.

I took it home and for some reason didn't want to turn it on immediately. i decided to first take it apart and see if there's any internal issues just in case. As soon as the back cover is off I see that 1 out of the three segments on the lithium ion battery expanded. yep gonna order a new one of that tomorrow. I'm not the most hardware savvy but I'm pretty sure an expanded battery can cause an explosion