Common Mistakes During an iPhone Battery Replacement

Common Mistakes During an iPhone Battery Replacement

Batteries deteriorate with time but like most things, they can be replaced. It is pretty simple if you have some experience with disassembling appliances but even with no previous experience it’s doable for most people.  

We at Scandi Tech have narrowed down a list of common errors made when replacing an iPhone battery.

Did not read the guide

It is the most common mistake that a lot of people make when replacing the battery. The guide is there for a reason and it is to aid in the replacement process. The entire task is straightforward but there are risks to consider, which are detailed in the guides. By reading our guide, you get to understand the importance of each step and how a single mistake can add difficulty to the replacement process.

Did not prepare well

The usual things to prepare is a spacious table with preferably a dark colored non-slippery mat in a well-lit room. This helps preventing losing tiny parts. The dark background also increases the visibility of screws and other small items. The tiny screws can be blown away easily with a gust of wind or even a sneeze. Keep this in mind when working near windows.

It is important to set enough time to do the repair in a calm, distraction-free environment. Experienced technicians can replace a battery in five minutes while a first-time technician may need up to an hour. Moving slowly is key when doing a battery replacement for the first time. Our battery kits for iPhone ( comes with all the necessary tools but if you already have these tools, feel free to opt for the standalone battery for iPhone (

Here’s a list of tools that we recommend when doing the replacement:

  1. Pentalobe screwdriver - This is used in unscrewing the two bottom screws of the device.
  2. Prying tool - A small tool need to pry up the screen (spudger could also be used)
  3. Spudger tool - A long plastic tool used as a wedge to disconnect connectors.
  4. Phillips screwdriver - Used to unscrew Phillips screws inside the device.
  5. Suction cup - Used to help lifting the phone screen.
  6. Metal tweezers - This is a grasping tool. Can also be used to help in prying up the screen.
  7. G. Tripoint screwdriver - Necessary for internal screws of the iPhone 7 and newer phone models. Not required for iPhone 6S or earlier models.

tools for iphone replacement battery

Reinstalling a screw into a wrong slot

Getting a new battery usually feels like getting a new phone. The excitement, sometimes, is too much that we tend to forget simple things - like reinstalling the screws into their original slots. A long screw inserted in a short slot will bore a hole into the motherboard causing damage. One way to prevent this is to organize the screws as you remove them. Place the screws in an area of the table where it won’t be easily disarranged or get blown by wind.

Careless in handling the phone screen

There are three sensitive ribbon cables behind the phone screen that have specific purposes. These cables are small and can easily be stretched or ripped if handled carelessly. If these ribbons get damaged, the phone screen may lose some or all functions.

There are two approaches during the battery replacement process and both work fine:

A. Leaning the screen & B. Removing the screen

  1. Leaning the screen - After removing the bottom pentalobe screws and lifting the screen to a 90 degree angle, the phone is opened with the screen leaning like a book. Once the screen has been lifted, it can be secured to a solid object, a book or the original iPhone box, for example. This method is quite risky if the screen isn’t perfectly still as the cables can tear.
  2. Removing the screen - This is the option that we suggest. By removing the screen, the three cables connecting the screen to the motherboard need to be disconnected then the screen can be lifted away and there’s no risk of slipping and damaging the cables. The downside is that re-connecting the screen to the motherboard can be a tedious task.

Careless in prying out the battery

In our guide, we’ve always highlighted the importance of safety. This is because the battery can potentially damage your device or yourself. All lithium batteries contain various chemicals that are necessary for the battery to work and store electricity. If the battery is pierced, punctured or severely bent, the containers inside of it can burst and cause a combustion (fire and smoke). Avoid this by being careful and not physically damaging the battery.

There are a few ways to take out the battery and we’ve presented several methods but give our recommendations.
In all iPhones since the 5C and forward, there are two (three for the Plus models) strips of adhesive holding the battery in place and secured to the back cover. These strips can be pulled out from underneath the battery. There is, however, a risk of tearing these strips as they are removed. If the strips tear, it’s likely that they can no longer be reached and pulled out. There really is no way of avoiding this completely. By pulling slowly, the risk of tearing the strips decrease but it’s never zero.

The second safest way of removing the battery is by inserting a fishing line (or similar string-type of object) underneath the battery and slowly working it from top to bottom until the battery separates from the adhesive.

It’s also possible to pry the battery up from the back assembly and adhesive. This method involves a risk of puncturing the battery if prying with too much force or with a sharp object. This should only be a last resort and if choosing this option, be extra careful and move slowly. Never lever against the motherboard as this will almost certainly damage sensitive components. Lever on the left side of the battery against the metal back assembly.

Did not TEST the new battery

The most overlooked step in our guide. Some do not test the new battery during the disassembly process and skip to completely installing the new battery. It is suggested to test the new battery as soon as the screen has been lifted to make sure that it works properly. Although our defect rates are very low, it never hurts to be thorough and confirm the battery’s functionality. Not testing the battery and completing the replacement may result in a situation where you’re forced to track back a few steps and adjust or remove the battery.

The connectors were not connected properly

The connectors (screen cable connectors and battery cable connector) should snap in place when re-installing them to make sure that they are seated perfectly. A good indicator that they have come into place is when a soft click is heard as the connector snaps into the socket. If the connectors are not fully connected, the functions they carry out may not work properly.

I.e. if the touch screen connector is not completely connected to the motherboard it’s likely that the phone will have touch issues. If this happens, an adjustment (disconnect then re-connect) of the connector will likely fix the issue.


The list could go on but we’ve just listed the most common mistakes that we hear about. These simple mistakes can be prevented by reading and understanding the guide. Some people prefer text/images guides while others prefer video guides. We offer both. We include a short guide with our batteries but  our full iPhone battery replacement guides ( are available online on our website.

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