Little bit of off-topic, but here is question, how long it last the battery of this Mi band 4? My old one Mi-band 2 is still working great, checked it now, last charged was 8 days ago and it's on 76% still. This is for 4-5 years old band.
On topic the notifications on the Mi-band 2 are working perfictly

Really depends on the amount of notification you get, but I usually squeeze 20 days out of it.
Hey!
If you are wearing the merit notification smartband, you definetly have to post a picture!