After update my battery is draining

Hi hameed_3431,

For battery concerns, the first step would be to check the battery health. Per iPhone Battery and Performance:

"Battery Health

For iPhone 6 and later, iOS 11.3 and later add new features to show battery health and recommend if you need to replace the battery. You can find these in Settings > Battery > Battery Health (with iOS 16.1 or later, find these in Settings > Battery > Battery Health & Charging)."

If your battery is in good health (over 80%), the next element to check will be app usage. About the battery usage on your iPhone, iPad, and iPod touch offers a good overview on the feature and how to use it. Apps that use a significantly higher amount of power than others may need to have settings adjusted or the developer contacted for recommendations.

You can also use Batteries - Maximizing Performance to increase the usefulness of each charge.

Regards.