iPhone Battery Replacement: A Complete Guide

August 1, 2023
7 minutes to read
911 Phone Repair Team
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iphone battery replacement : a complete guide

Is your iPhone more sluggish than when you purchased it? Go to Settings > Battery > Battery Health > Peak Performance Capability. Do you see any battery warnings? If it says your battery health is significantly degrading, then it means your iPhone needs a battery replacement. 911 Phone Repair is here at your rescue with the complete iPhone Battery Replacement guide!

Let’s begin.




(Tools + Battery + Other Components)

  • iPhone 14 series: $99
  • iPhone 13 to iPhone X: $89

30 min to 1:30 hour

Apple’s iPhone Battery Features And Its Performance 

Did you know the capacity of your iPhone’s battery dips down to 80% within 18 to 24 months of its purchase? It means your battery will be full but can only hold 80% of its original capacity. Of course, it doesn’t happen until the 500 charging cycles. However, besides the charging cycle, there are a lot of other things that cause battery issues.

But first, let’s understand various Apple iPhone battery features–

a. Batteries With Lithium-Ion

iPhones have lithium-ion batteries. Due to this reason, it charges faster, last longer, and has a higher power density. However, these batteries chemically age, meaning their ‘Peak Power Performance’ decreases over time for various reasons.

b. Fast Charging Capability

Isn’t it great that iPhone batteries can fast charge up to 50% within 30 minutes? However, the catch is you will need designated Apple iPhone adapters. For instance, Apple USB-C (18W2, 20W, 29W, 30W, etc.) Power Adapter. You can also use a third-party USB-C power adapter that supports USB Power Delivery (USB-PD).

c. Optimized Battery Charging For iOS 13 And Later Phones!

iPhone with iOS 13 or later has a feature called ‘Optimized Battery Charging.’ The on-device machine learning learns your daily charging routine and helps to slow down the rate of battery aging by reducing the time your iPhone spends fully charged. Basically, it learns your daily charging routine and charges your device to 80%, further holding off there until you decide to charge the remaining 20% battery.

Note: Usually, Optimized Battery Charging turns on by default with the iOS 13 or later upgrades, but if you want to know where this feature is– Go to Settings > Battery > Battery Health & Charging (Turn it off or on!)

d. Battery Health Meter (i.e., Maximum Capacity)

For iPhone 6 and, later, iOS 11.3 and later, there’s a feature called ‘Battery Health.’ It shows the maximum capacity of the battery in comparison to when it was new or was at 100%. With this feature, you can navigate the current state of your iPhone’s battery.

e. Wireless Charging

Apple also has Qi-certified wireless charges for the iPhone. These are externally added battery-related features as it helps users to charge their iPhone by magnetic induction without having to plug into a power socket.

Almost all of the latest iPhones have these fundamental features, which help deliver maximum battery power.

Factors Affecting iPhone Battery Performance 

Here are some factors affecting iPhone battery performance–

a. Temperature Fluctuations

The iPhone functions best at 32°F to 95°F; if there are temperature fluctuations above or below this range, then it will cause the battery to drain faster. On top of that, temperature fluctuations can also cause battery damage over time.

b. Battery Age

A phone’s battery is always limited to specific charging cycles. Once it hits its ultimate cycle, its performance starts to decrease. Apple recommends replacing the battery after reaching 80% capacity, i.e., after you’ve charged your iPhone over 300 to 500 cycles. It’s an unavoidable factor that affects the iPhone;s battery performance.

c. Your Charging Habits!

How and when you charge your iPhone, 100% affects battery performance! Do you overcharge your iPhone using low-quality chargers? – You are practically lowering the battery life of your iPhone through your habits. It’s always necessary to use Apple-approved charges and follow proper charging habits like disconnecting once your device gets fully charged!

d. iOS Updates

iOS updates help improve your iPhone’s battery life by optimizing performance and addressing battery-draining bugs. However, they also introduce new features that consume more power, decreasing battery life. So, iOS updates are like a double-edged sword to your iPhone’s battery.

e. Power-Hungry Apps!

We are talking about the background apps like GPS navigation that runs without you knowing and apps that need maximum brightness like Games or video streaming. Due to apps like these, your iPhone’s battery drains more quickly, which causes you to charge your phone more often.

How To Identify When Your iPhone Battery Is Not Performing Efficiently?

Here are a few signs that scream that your iPhone’s battery is not performing efficiently, and you must replace it ASAP!

  • Your iPhone switches off often even though your battery is at 50%.
  • There are lower frame rates while scrolling or launching an app. Meaning that your iPhone is unusually sluggish. You can figure this out by going to Settings > Battery > Battery Health > Peak Performance capability. And if you see Battery Health Unknown, your iPhone needs a battery replacement. You will most likely see this message–“Your battery’s health is significantly degraded….”
  • Its battery life doesn’t last long. You need to charge more often.
  • You can only use your iPhone when you plug in to charge.
  • Does your iPhone overheat a lot? – Yup, that’s a battery problem!
  • You notice bowing or case separation in the side of your iPhone, or even a white screen, screen crack, or feeling squishy while pressing on your screen. These signs say that your battery has swollen. And it needs a professional inspection immediately.

Step-By-Step Process To Replace An iPhone Battery

Now that you know the signs, let’s proceed with the iPhone battery replacement process. But before that, get these tools ready–

  • P2 Pentalobe screwdriver
  • Phillips #000 screwdriver
  • Nylon spudger
  • A suction cup
  • Tweezers
  • A fresh iPhone battery (compatible with your specific iPhone model)

Step 1: Opening The iPhone Case

  • You need to turn off your iPhone and remove the SIM card tray.
  • Now, remove the Pentalobe screws at the bottom of the device near the charging port.
  • Place the suction cup on the iPhone’s screen and slowly pull it up to create a gap between the screen and the rear case.
  • Insert the spudger into the gap and carefully pry open the display.

Caution: Do not damage the cables connecting the screen to the mainboard.

Step 2: Disconnecting The Battery From The Device

  • Remove the screws securing the metal plate that covers the battery connector.
  • Using the nylon spudger, disconnect the battery connector from the mainboard.

Step 3: Installing The New Battery Securely

  • Carefully remove the old battery by gently prying it out of the device with the spudger.
  • Insert the new battery into the iPhone and make sure that the connector aligns properly with the mainboard.
  • Reconnect the battery connector.

Step 4: Re-assembly And Testing

  • Replace the metal plate over the battery connector and secure it with screws.
  • Align the display to the rear case, and see if all connectors are correctly seated.
  • Apply gentle pressure around the edges to seal the device.
  • Replace the Pentalobe screws at the bottom of the device.
  • Turn on your iPhone and test the new battery.

Do You Need To Go To An Apple Authorized Battery Reseller For Genuine Replacement Batteries?

If you don’t want to avoid getting counterfeit batteries without genuine Apple battery performance, you need to go to an Apple-authorized battery reseller.

An Apple Authorized Battery Reseller will provide you with these advantages–

  • Genuine Apple Batteries: Authorized resellers only use genuine Apple batteries, ensuring safety and optimal performance.
  • Expert Installation: Certified technicians follow Apple’s guidelines and have the necessary tools to replace your battery without causing any damage to your device.
  • Warranty Protection: Repairs performed by Apple Authorized providers do not void your device’s warranty and, in some cases, may even extend it.

Best iPhone Battery Vendors With Quality Replacement Batteries

Before we dive into the best vendors, let’s first discuss the crucial factors to consider when selecting an iPhone battery vendor:

  1. Compatibility – Ensure the battery is compatible with your iPhone model.
  2. Quality – Look for batteries that meet or exceed OEM (Original Equipment Manufacturer) specifications.
  3. Warranty – A good vendor should offer a warranty to back their product.
  4. Customer Reviews – Check for positive customer reviews and testimonials.

Here are the top iPhone battery vendors offering quality replacement batteries.

iPhone Battery Vendors

About Their Quality Replacement Batteries

  • Meet or exceed OEM specifications
  • Come with a one-year warranty
  • Include necessary tools and adhesive for easy installation
eTech Parts Plus
  • OEM-grade batteries for a variety of iPhone models
  • A 365-day warranty
  • Fast shipping and customer support
  • Extended battery life compared to the original battery
  • Compatibility with a wide range of iPhone models
  • A one-year warranty

5 Tips On Maximizing iPhone Battery Life

Here are quick tips on maximizing iPhone battery life

Tip 1: Enable Low Power Mode

  • Make your battery last longer by not charging it frequently.
  • To enable ‘Low Power Mode,’ go to Settings and click on Battery.

Tip 2: Optimize Wi-Fi and Cellular Connectivity

  • When Wi-Fi is unavailable, turn off Wi-Fi to avoid constant scanning for networks.
  • Turn off Cellular Data when Wi-Fi is available to preserve battery life.

Tip 3: Disable Push Notifications For Less Important Apps

  • Go to Settings > Notifications and customize notifications for each app.

Tip 4: Reduce Screen Timeout Duration

  • Adjust screen timeout settings by going to Settings > Display & Brightness > Auto-Lock.

Tip 5: Turn Off The Vibrate Function

  • Vibration consumes battery power, so turn it off when not needed.
  • Go to Settings > Sounds & Haptics, toggle off Vibrate on Ring, and make it Vibrate on Silent.

Contact 911 Phone Repair For Professional iPhone Battery Replacement In Oklahoma

At 911 Phone Repair, we understand the importance of a healthy iPhone battery. Our certified technicians are here in OK to assist you with iPhone battery replacement. Here’s why you should choose us:

  • OEM-Quality Batteries
  • Quick and Efficient Service
  • Competitive Prices
  • 90-Day Warranty

Contact us in Oklahoma today!


So, is it easy to replace a battery? – We are not saying you should replace the iPhone’s batteries on your own. We just hope you know what goes through its replacement process. But if you want to give it a try with the DIY iPhone battery replacement, then good luck! If things go south, remember 911 Phone Repair. We are here to help you with any iPhone battery-related issues!

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