Bought the VC04 short circuit finder last Sept. Tried it to see if it was working, which it was.Had an operation in my eyes; just started working back in electronics.The VC04 is not working anymore.I let it charged for a whole night , but when I tried it there’s nothingcoming on the screen.Could it be that the batteries are dead? What kind of batteries do I need to fix it? If you want me to post some pics. just tell me. Thank you very much.