7 Best Ways to Preserve 100% Battery Health on iPhone

Like many battery-operated devices, even the iPhone’s battery runs to its end of life eventually. Luckily, iOS software packs enough indicators and options to know and maintain the iPhone’s battery health. That means your iPhone’s battery life will not be the same as it was on day one. This ability of a battery to retain charge is commonly referred to as battery health.


When the battery health reduces, your iPhone’s battery life gets slightly worse. And the performance takes a hit as well. While depreciating battery health is inevitable, you can certainly reduce the rate at which the battery loses its charge-holding capacity. Here’s how to preserve battery health on your iPhone and increase your iPhone battery’s longevity.

What Is Battery Health

Battery health is a parameter used to determine the maximum charge-holding capacity relative to when it was new. When a battery is brand new, the battery’s maximum capacity is 100%. With time, this value reduces. For example, your iPhone’s battery may only be able to retain 90% of charge after a year of use. This implies the battery on your iPhone has a maximum capacity of 90%.

iPhone Battery

The greater the maximum capacity, the better the endurance you can expect. That’s why a brand-new iPhone lasts longer than an old iPhone. Maintaining your iPhone’s battery health is important to make the phone last longer. A healthy battery means good performance and good battery life.

What Is a Good Battery Health

There’s unfortunately no fixed metric to determine good battery health. It depends entirely on your usage. Ideally, battery health above 90% is considered good. Though Apple says anything above 80% should still ensure your iPhone performs at max capabilities.

How to Check Your iPhone’s Battery Health

You can check your iPhone’s battery health by performing a few simple steps. Note that your iPhone should be running iOS 11.3 and above for the battery health to be visible.

Step 1: Open the ‘Settings’ app on your iPhone and navigate to the ‘Battery’ section.

iPhone Settings

Step 2: Tap on ‘Battery Health.’ You will see the maximum capacity of your battery listed.

How to Preserve Battery Health on iPhone

You can maintain good battery health on your iPhone by following a few simple steps. These tips should be useful regardless of whether you’ve bought a new iPhone with 100% battery health or you’re using an older one with reduced capacity. If you’re wondering what makes your battery health go down, here are all the possible reasons along with suggestions to circumvent the issue.

1. Enable Optimized Charging

This is a neat little feature present on all iPhones running iOS 13 or later. It optimizes the charging pattern of the device based on your usage habits. It learns your battery charging habits with time and then decides when you might need to fast-charge your iPhone and when it can charge at a slower rate.

For example, if you charge your phone overnight, the charging speed will be slower since there’s ample time to charge the battery. However, if you plug your phone in during the middle of the day, it will charge faster. Here’s how you can enable it.

Step 1: Open the Settings app on your iPhone. Navigate to the Battery section.

iPhone Settings

Step 2: Tap on Battery Health.

Battery Health option

Step 3: Enable the ‘Optimized Battery Charging’ option.

Optimized charging

2. Use MFI Certified Cables and Adapters

It’s always advisable to use Apple’s original accessories that ship with the phone. However, since Apple has stopped including a charger with the iPhone, you’ll need to purchase one separately. You can get Apple’s official charging adapter or pick an MFI (Made for iPhone) certified iPhone charger or wall adapter.

iPhone charger

An uncertified aftermarket charger or cable can damage the iPhone’s battery. Here’s one of the best iPhone chargers you can buy for good battery health.

3. Keep It Away From Direct Sources of Heat

Heat is one of the biggest enemies of any battery. Avoid subjecting your iPhone to extreme heat. You can do this by not leaving your iPhone on your car’s dashboard when you’re driving in the sun. Try not to perform demanding tasks like gaming while you’re out in the sun. The heat from the sun plus the extra heat generated by the CPU combined with the screen at max brightness will take a toll on the battery.

4. Do Not Perform Heavy Tasks While Charging

Avoid using your iPhone while it is charging. Let it charge peacefully not put any load its hardware. Performing resource-intensive tasks like gaming while your iPhone is charging will generate more heat. Also, excessive heat can damage the battery over time.

iPhone in car

5. Use a Smart Plug to Regulate Charging

If you’re someone who charges their phone overnight, getting a smart plug can help you regulate your iPhone’s charging to a good extent. You can set a timer using the plug such that it remains switched on only for a couple of hours. While the iPhone does come with overcharge protection and several other safety mechanisms, it’s a good habit to regulate charging.

iPhone charging

Personally, I plug my iPhone in overnight but the smart plug is switched off. I’ve set the plug to automatically turn on at 3 AM and turn off at 5 AM every day. This way, my iPhone gains up to 100% charge by the time I wake up in the morning. And since it turns on only for two hours, the battery remains safe.

6. Do Not Drain the Battery Completely

It’s never a good idea to drain your iPhone’s battery completely to zero. Batteries undergo more stress when charging from a completely discharged state. This will affect the longevity of the battery in the long run.

iPhone battery health

Try connecting your charger when your phone is below the 10% mark, and don’t wait till it completely shuts off.

7. Use a Wired Charger Instead of Wireless

Wireless charging is undoubtedly extremely convenient. However, it involves a substantial loss of energy in the form of heat. And when your iPhone gets hot, it impacts the battery.

iPhone on magsafe charger

So whenever you can, try using a wired charger instead of a wireless one. It will surely help you keep your iPhone battery health at 100% for a long time. In fact, you can follow our comprehensive guide on how to conserve iPhone battery along with charging tips.

FAQs for Improving iPhone Battery Health

1. How to reset battery health on an iPhone?

You cannot reset an iPhone’s battery health. It stays the same unless you replace the battery in which case it goes back to 100%.

2. How long does an iPhone battery last?

A brand-new iPhone battery should easily last more than two years until its capacity drops below 80%. You can then get the battery replaced for a nominal fee and continue using the iPhone normally.

3. When to replace my iPhone’s battery?

If your battery health dips below 80% or if your iPhone shows you a warning message that the battery needs servicing, it’s time to head to the Apple store to get it replaced.

4. How much does an iPhone battery replacement cost?

Apple charges anywhere from $69 to $99 for a battery replacement.

Extend the Life of Your iPhone Battery

The simple suggestions mentioned above will ensure your iPhone battery lasts longer and the maximum capacity of the battery remains high for a significant time. You cannot stop the battery health from depleting, but you can slow down that process to a certain extent.

Last updated on 31 August, 2023

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