There's nothing wrong with your product...I love it! I'd like to have a power supply to make it more mobile however. I purchased a Black and Decker 400 power supply and, while it will allow it to run for a few seconds, the chain saw then turns off. I'm assuming it requires too much power. Do you have a suggestion for what I could use that would be as inexpensive as possible (the Black and Decker 400 cost $100)?