Why is 16.2 update battery drain?

Hi Aridm,

We see you're posting from the About the battery and performance of iPhone 11 and later page. If you're having some battery life concerns here are some troubleshooting steps available to optimize your settings:

"Optimize your settings.

There are two simple ways you can preserve battery life — no matter how you use your device: adjust your screen brightness and use Wi‑Fi.

Dim the screen or turn on Auto-Brightness to extend battery life.

• To dim, open Control Center and drag the Brightness slider to the bottom.
• Auto-Brightness adjusts your screen to lighting conditions automatically. To activate it, go to Settings > Accessibility. Tap Display & Text Size, then turn on Auto-Brightness.

When you use your device to access data, a Wi‑Fi connection uses less power than a cellular network — so keep Wi‑Fi on at all times. To turn on Wi‑Fi, go to Settings > Wi‑Fi to access a Wi‑Fi network."

You can find more troubleshooting in the full resource here: Batteries - Maximizing Performance

If the troubleshooting does not help and the issue persists you can reach out for additional support here: Get Support

Take care.

Optimise settings! What does this mean? Since downloading 16.2 on my iPhone 8 my battery drain’s without even using the phone. Apple what is the explanation and how are you responding and remedying this widespread problem?