Hello, guys. Thanks for you such nice post to teach us more details in this field. Usually we will use the surge protector to protect our equipment from charging. Especially for light. So we are used to choose a good quality surge protector to charge tools. The tool for me is bestek 4 outlet surge protector, friend recommends this tool to me two years ago. There is no damage of any tool. Maybe you can search bestekmall on Google to learn more details about it. Hope this point is useful to you.