Ive had this light for over a year now . I managed to tear up the led. Im new to this, but I figured I would upgrade while I had a chance. I was checking my voltage, and realized that my battery pack sayes 3.6v and it measured 3.9v. Then at the wires that solder to the led it read 7.2v. Can some one please explain this for someone who is just starting to learn this?