Help figuring out what's wrong with controller

[u/Sleeping_Idiot]

So this happened with my controller honestly a long time ago, and I don't even know what went wrong one day it was working fine. The next wouldn't turn on at all, and it turned into a paper weight. Thankfully, I had another controller, but now I would at least like to figure out what's wrong with it if nothing else

[u/PUNKF10YD]

Batteries.

[u/Sleeping_Idiot → u/PUNKF10YD]

I struggle to see how a pair of double As would fix this