ios update

Its normal. When you make an iOS update, the iPhone performs many activities and the battery is subjected to greater stress than usual.

Tap on battery health and see the maximum capacity percentage. If it has a value less than 85%, it means that your battery is reaching the critical point of its life, and could have unpredictable behaviors.

Keep on monitoring that value and backup your data at least once a week. If you see weird behaviors, have your battery replaced.

Regards

Giulio

The “Insights and Suggestions” is part of the Battery Health section and was introduced with iOS12 to help give users tips on how to extend battery life.

If you are only just seeing it that may indicate you are using the device more than usual.

I’m not sure about this but I don’t believe it’s triggered by any set usage time, rather the device learns from your previous behaviour patterns and the tip only gets triggered if you vary from that norm.

Hope this helps.