As per the title.
The full story goes as the following. I bought a Ryobi ONE+ battery with charger second hand, condition unknown. It was cheap, was more for curiosity. As expected the battery did not move any tools but registered as fully charged soon after connecting to the charger. I tried to jump start it as seen on countless videos on youtube. I made a mistake and mixed up the polarity from another battery and I blew something inside. I heard a click like noise but did not really smell anything.
I took the battery apart and found a component blown. Unfortunately I have no idea what is this component... In fact I am not very educated with PCBs and their components. However I would like to make this battery working (again for my own benefit rather than for saving money).
I seek for help identifying the remains of the component and would like to try to replace it on the board. I have the equipment to do it but nothing more really. I used to replace capacitors in PC motherboards with success so I'd like to consider myself capable of changing the component itself.
Please look at the pictures and if you have any idea what it can be let me know.
Thanks for your help in advance!