How to know this component on the PCB

Recently my mouse is not working. While using it, the mouse shuts down. I tried to turn off and on the mouse, it was working for a second until the i noticed the sensor began to fade and eventually turn off. I opened the mouse and saw this burnt part on the PCB. I want to know what part is it and its value so i could replace it if it was really the problem. I tried with a new battery and the problem still occurs.