How can I increase battery health on my iPhone?

There is no way to increase the health of your current battery. Real battery health always goes in one direction: down, even if a phone's estimate might occasionally fluctuate up.

iPhone battery and performance - Apple Support

If your battery health has fallen below 80 percent, you can pay Apple or an Apple Authorized Service Provider to install a new battery. The new battery's health will start at 100 percent, then go down over time, just like the old battery's health did.

iPhone Battery Replacement - Apple Support

You cannot add to your battery health. Batteries are consumable items and your battery health will always get lower. If your battery health is 80% or below, contact Apple support to have it replaced. That is the point where Apple recommends a battery replacement.

Mamadoulailasy wrote:

how can i ajux my battr

i want + my battery health

Not sure what that means...(?)

Maximizing Battery Life and Lifespan

Batteries - Maximizing Performance - Apple

About Optimized Battery Charging on your iPhone

About Charge Limit and Optimized Battery Charging on iPhone - Apple Support

Apple Authorized Service Providers and Independent Repair Providers

Repair Provider Verification - Official Apple Support

iPhone Repair and Service / battery / cost - Apple Support

iPhone Repair and Service - Apple Support

Phone in diagnostics mode - identify potential hardware and software issues

How to put your iPhone in diagnostics mode - Apple Support