iCharger 308 Duo help needed
 

Hey All,
I was trying to repair my I-charger 308 duo. I opened the heat sink, I accidentally, damaged one of the parts. The part has this written on it: "HY4004, P". Does any one has an idea what can be done? What part is it? Can i claim it from Junsi, where i purchased it?

I don't own one of these chargers but it appears to be a MOSFET. Is it surface mount or through hole? Can you take a picture? If you damaged it you should be able to just replace it assuming the damage was only done to the part itself.