How do I stop my circle case display lighting up when phone is fully charged?

[AC Question]

How do I stop my circle case display lighting up when phone is fully charged

I use a Qi charging stand with my Circle Case and sit my phone at night on the charger. Unfortunately, when the phone is fully charged the display comes on for a few seconds (maybe 10) then goes out, a minute later it will do this again and again etc...
I can't use the Qi charger now as it wakes me and the wife, I have to have the phone face down on the table when charging!