When the device reaches 100% battery and still connected to a charging cable, it still shows the device is charging. I thought it wasn't complete charging, so I left it all day long charging and thought my device had some kind of issue with the battery. I just noticed everything was alright when I plugged the cable out my MX Keys keyboard and Logi Options+ told me, finally, the battery was fully charged. My suggestion is to show that the battery is fully charged when 100% and still connected to the device, instead of showing the user it is still charging. (And if possible, show the percentage while charging)