iPhone battery not performance

Protect & Prolong the Life of your iPhone's Battery:

1. About the battery usage on your iPhone, iPad, and iPod touch ...
2. Batteries - Maximising Performance - Apple (IN)
3. iPhone Battery and Performance

Since Apple Update 16.5 I have been been able to get a lasting charge on my iPhone 13 Mini or my Watch 5 which were working great. I had to buy a new iPhone 14 as there is no Apple Store within 100 miles of my home. My Mini would not hold a charge for 4 hours and my watch for 2 hours. The 16.5.1 update has made it worse.

Apple what’s up?