How do I keep my iPhone battery healthy for a long time?

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.

Li Ion (Lithium Ion) batteries have recharging capabilities; however there are limits.

I recommend to slow charge your iPhone to maximize the charge capacity, battery health and efficiency. ⚡️🔋

NOTE:

Capacity loss in standby applications is largely determined by temperature.

Charge above -30°C and discharge below 55°C for best results.

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.

Click ▶︎ iPhone User Guide. 📖

Good luck! 👋🏼😉

The best routine for charging your iPhone is to leave it plugged in all night, every night, using Optimized Battery Charging. Some people, myself included, take it a step further by setting a charge limit, which reduces the amount of time your iPhone stays fully charged.

Ultimately, it comes down to personal preference. You can either start your day with a fully charged battery or extend your battery health a bit longer over time.

The other thing is that it’s not good to let your iPhone battery get below 20% charge, which is the worst thing you can do to a rechargeable lithium battery. Keep in mind, All batteries eventually need to be replaced. When yours reaches 80%, be sure to do so.

You should also take a look at the following articles:

Batteries - Maximizing Performance - Apple

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

Tap Settings > Battery > Battery Health & Charging

What % is the Maximum Capacity?