Issue resolve technique for Nokia 3 Battery draining and switching off at 40% percentage

After update received with Andriod 9, I am facing an issue with battery charges 95% and drained to 40% (after usage around 4 hours screen ontime) and then shutdown and shows 0% when charger plugin.

I did one thing, I have charged until 50% and enable battery saver at 15%.

When battery drains to 15%, then charge again to 50%.

Let keep this practice for 10 days, then battery works well to me.