Help with wireless charging

Can anyone tell me why this charger keeps a current of 500mah after the phone is listed as charged. Where is the current going?

Thank you

Half an amp seems high, but I’m sure it’s going to running the charger a bit and “looking” for a phone. Unlike a wired charger, there’s no circuit completed when a phone is dropped on the pad, so there will always be some standby drain.

Thank you for the feed back but does 500 seem a bit high for stand by