Arduino Powered by Wall outlet Safety

Hello,

I have an arduino micro and I am curious of the feasibility of keeping it plugged in to a usb cell phone type charger indefinitely. I would like to not worry about batteries. Is this a good idea or not? I am concerned over quality control of each board and whether it's truly safe to keep plugged in. Are there any built in safe-guards? What can I do to ensure a fire does not occur. Any and all answers appreciated.

Thank you

Yes, good idea.

There's one basic fuse on board the Arduino. You real protection against starting a fire is the charger will have a limited output current before it stops giving power.

Thank you. Just to be sure, would a samsung s7 charger or modern cell phone charger have these built in protections?

Yes.