My iPhone 11 battery only lasts for 5 hours

Yours is not a new phone and it is certainly possible that the battery is beginning to wear out. the average Apple Battery lasts about 2 years with normal usage. I suggest that you make an appointment at the nearest Apple Store for possible Battery Replacement. If the problem lies elsewhere, they will be able to find the trouble....

Apple Store - Find a Store - Apple

Check Settings > Battery > Battery Health / Maximum Capacity

If the phone is 9 months old, that number should read about 90-92%

How does it look?

All rechargeable batteries are consumable components that become less effective as they chemically age.

Recent software updates can accelerate that process by adding features that consume more power.

As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged.

Apple won’t replace the battery until it reaches 80% capacity.

It takes approximately 2 years to go from 100% to 80% capacity.

Battery Performance Tips:

• iPhone Battery and Performance.
• Check battery health and usage.
• Optimized Battery Charging.
• Maximizing Battery Life.
• Use Low Power Mode.
• About battery usage.
• Show battery percentage.

Need more help?

• Chat now or call 1-800-APLCARE.
• International Support.