The evidence says a camera flash barely dents what museum lighting already does to pigment each year. The real reasons galleries still ban it are older than digital cameras.

Two USB-C chargers can look the same, cost the same, and still charge at wildly different speeds. The difference lives in the USB Power Delivery negotiation, not the plug.

The chime you did not ask for has a cause, and it is usually a hearing-safety feature that needs a listening mode switched on to work at all.