Battery charge time changing

[Keez]

Plug in Samsung galaxy S20 5g to charge and says full charge in for example 1hr 10m.  After a few seconds, it changes to something like full charge in 3hr 45m.  Have changed cable and tried different sockets, enabled fast charge on phone etc but nothing works.  Any ideas? 

[Cleoriff]

@Keez 

You really need to ring Samsung https://www.samsung.com/uk/support/contact/ 

My Note 10 does the  same. I take the charger out and push it in more forcefully and then it always goes to fast charge.

[Enlli]

Run a diagnostic in Samsung Members App by choosing the Support Icon bottom right

From there you can check the state of your battery.