Hi Patrik1 and Guillaumee, I have exactly the same symptoms ! My phone suddenly stopped to charge and have the same behavior as yours. Have you solved your problem and how ?
I cleaned the battery contacts on the phone and on both my batteries and it is still not working. Moreover, I tried with several different charging cables, all of them working on other objects, it did not change anything.
I am thinking of contacting the Support service but I have not made a back up yet and so, since my phone cannot be turned on, I do not know how to get the data on it before. I have looked on this wiki : ✏ Backup Tools for FP OS but all of them need the phone to be turned on, any idea ?
Another solution may be to buy a new bottom module but I do not any any to test if it will solve my problem and if it comes from the top of the battery slot, there is not module available to change, right ?
Have a good day !