When to replace iPhone SE (3rd gen) battery at 89% health?

stevenjmorgan wrote:

iphone SE (3rd gen 2022) battery health:

my battery health is at 89%

how long do I have before I’ll need to replace the battery? Since the iPhone SE is an outdated model, I’m trying to preserve it.

First understand you cannot stop the natural and normal decline in Battery Health. When it's health tips to 80% or below, that's when you either pay Apple to replace the battery or trade your phone in for a new iPhone. You likely have a few months to go before that will happen on your phone.

I wrote this about Battery Health decline and there are links inside which may be helpful to you --> Battery Health Decline - Should You Worry… - Apple Community

Tap Settings > Battery

Set up the battery for Optimized Battery Charging

Connect the iPhone to the charger and leave it connected all night....every night

As a very rough guide, you can generally expect the battery health to decline about 1% a month. So, you likely have 8-9 months left before you need to replace the battery.

Replace the battery when the Battery Health / Maximum Capacity dips under 80%.

About $75 (U.S.) at the Genius Bar or an authorized Apple Service Provider (AASP).