Is it OK to leave a power adapter plugged in?
Is it OK to leave a power adapter plugged in? It's safe, it just wastes power and raises your electrical bill by keeping the adapter powered up. No harm done other than a bit of energy wasted. As for the computer, there are many laptops in offices that are plugged into adapters all day every day. How do I know if my AC adapter is bad? Wiggling the power plug, if it gets hot, or see sparks, then it is the adaptor having a bad plug. If the power plug is loose or plugs in weak. Are you using electricity...