iPhone 6S – Step by Step Guide


Before you start:

General tips before you get started with your battery replacement

We recommend reading through the whole guide before performing the battery replacement. This will give a general idea of what you are up against and you will feel more comfortable when disassembling your iPhone. We’d like to begin by issuing caution throughout the battery replacement process.


 The front is mostly made out of a glass screen and an LCD underneath it. If this part is not handled with care, the glass can shatter and/or the LCD can break.


Almost all screws inside of the phone (not the bottom screws next to the charging port) are of different lengths. After the screws are removed, they need to go back into the same place they were removed from. Pay attention to this during reassembly. Organize the screws when removing them!


The connectors connecting various parts (touch, LCD, battery and the home button) to the motherboard are fragile and can be damaged if they are not handled with care. Always disconnect and reconnect these connectors carefully and preferably with a plastic tool or your finger.


We recommend removing the battery (Step 8) by pulling out the adhesive from underneath it. However, this is the step most people fail. The adhesive tears easily when pulled. Thread slowly!
If the adhesive tears, the battery needs to be pried out. This process is much easier if either a hair dryer, heat gun or a warm halogen lamp is used to soften the adhesive. More info under Step 7.


Keep in mind that much like other delicate electronic devices, complications can arise. If you are uncertain how to continue, message our support (support@scandi.tech).
It’s also a good idea to make a backup before replacing the battery. If everything is done correctly, no data will be lost during or after the repair process, but to be on the safe side, making a backup is recommended. Let's Get started!

Detailed guide to replace battery on iPhone 6S

Step 1

Turn off your iPhone. Locate and unscrew the two pentalobe/5-star bottom screws next to the charging port with the small pentalobe screwdriver.


Unscrew the two bottom screws


Step 2

Separate the front assembly from the back assembly by pressing the suction cup against the glass as closely to the home button as possible, but not on the home button, and gently pulling the front assembly upwards from the back assembly.
Lift the front assembly only a tiny bit to expose a small opening between the front assembly and the back assembly above the charging port.
If the front assembly does not separate from the back assembly when pulling it with the suction cup, the tweezers must be used to separate them. If your front assembly is cracked or if the back assembly is bent or dented, using the tweezers could be the only way to separate these two assemblies. Put the tweezers between the front assembly and the back assembly (between the metal and the plastic frame – not between the glass and the plastic frame) just over the headphone jack. Thread carefully. The front assembly is made out of glass and will crack if it's bent excessively.

* Sometimes the glue holding the glass to the plastic frame is weakened and when pulling with the suction cup, the glass can separate from its plastic frame. If this happens, proceed to separate the plastic frame from the back assembly with the tweezers, as shown below.
* The tweezers can leave a tiny mark on the back assembly, be careful!


Step 3

Stick the opening tool or the spudger into the opening and slowly move it along the side to further separate the front from the back assembly. The front assembly on the iPhone 6S is held together with the back assembly with a double sided adhesive that runs along the inner edge of the frame. If it becomes exposed, pull it out. This will make the separation of the front assembly much easier.
* If the front assembly frame is stuck to the back assembly, wiggle the tool to separate them. Broken or damaged front assemblies are in general more fragile and could crack if too much force is applied!


Step 4

Once the front assembly is loosened from the back assembly, lift it to a 90 degree angle from the back assembly and hold it at that angle with one hand.
With your other hand, unscrew the two screws holding the battery connector plate. Keep in mind to organise the screws as they need to go back into the same hole they were removed from.


Lift the front assembly to a 90 degree angle


Unscrew the screws holding the metal battery cover


Step 5

Keep holding the front assembly at a 90 degree angle and lift off the battery connector plate from the battery connector with the tweezers. Continue by separating the battery connector on the battery from its connector on the motherboard with either the spudger, the opening tool or your fingernail.


Test the new battery!

At this point it is very easy to connect the new battery without removing the old one. It’s a good idea to do this in order to verify that the new battery is performing as it should without taking the phone fully apart. In case the new battery is damaged or faulty in any way you have saved yourself the trouble of taking the phone apart twice.

To test the new battery, just place it over the current battery (without removing the current battery from the phone) and connect the new battery’s connector to its socket on the motherboard. Once the battery is connected, start the phone. You can either hold the front assembly at a 90 degree angle during this process or you can lower it in a similar fashion as when rising it up.


Place the new battery on top of the old battery and test it

Start the phone and make sure the battery works


Once the phone has booted up with the new battery, plug in the charger to the phone and let the phone charge at least 3%. If the phone charges the battery should be fully working and the replacement process can be continued. If the phone does not start right away when the new battery is put in place, it is possible that the new battery is completely discharged. In this case, let the phone charge for at least 15 minutes – that’s how long it can take before something shows up on the screen.Once the new battery is tested, turn off the phone and unplug the new battery’s connector, remove the new battery and continue following our guide.


Step 6

At this point, you can either skip directly to removing the battery (Step 8) while holding the front assembly with one hand at a 90 degree angle or you can remove the front assembly to have both hands free. Both ways have up- and downsides;
NOT removing the front assembly and skipping to Step 8:
Downside: You only have one hand to work with. You could risk damaging the front assembly if you do not hold it correctly.
Upside: You will relieve yourself of the hassle of disconnecting and reconnecting the front assembly, which could get tricky, especially to reconnecting the flexes. During this process the flexes could also be damaged. You save yourself a few minutes of the whole repair process.

We recommend disconnecting the front assembly as the cables connecting it to the motherboard easily break under stress, and it is tough to hold the phone still while removing the battery. If you can ask someone to hold the front assembly for you, try to proceed without removing the front assembly. If you change your mind, you can at any point return back to this step and remove the front assembly completely.

Removing the front assembly
Keep holding the front assembly at a 90 degree angle and remove the four screws (the top right side screw is non magnetic!) holding the metal LCD connector cover. Make sure to organize these screws in the order you remove them. It’s crucial that each screw is put back in its respective place.


Identify the metal cover and the four screws in the top right part of the phone and unscrew them


Example of how to organize the screws (front assembly has been removed)


Step 7

Keep holding the front assembly at a 90 degree angle and remove the metal cover. Proceed by disconnecting the LCD connector, touch connector, and the sensor/front camera connector from their connectors on the motherboard. Disconnect the connectors carefully. They are quite fragile and bend easily. Once they are separated, the front assembly can be lifted off safely.
Use caution during this step as there are components (controlling rotation and touch functions) close to the connectors that are easily damaged. Use the plastic tools to disconnect the connectors and avoid levering with force against components on the motherboard.


Remove the metal cover


Identify the LCD, touch, and front camera connectors


Disconnect the LCD, touch, and front camera connectors with the spudger or your fingernail


Disconnect the LCD, touch, and front camera connectors with the spudger or your fingernail


Disconnect the LCD, touch, and front camera connectors with the spudger or your fingernail

Step 8

Remove the battery. The battery is held down by double-sided adhesive. The adhesive strips end at the bottom side of the battery and sometimes need to be gently scraped up/unfolded from the battery. Be careful when pulling the black strips. They tear easily and complicates things if torn/broken. Go at it slowly.


Unfold the black strip


Unfold the black strip


Unfold the black strip


Unfold the black strip


Step 8.1

From here on there are two ways of removing the iPhone 6S battery. We recommend the second (last) option (8.3) but please read and consider both of them.

8.1. This step is optional but recommended. The taptic engine (controlling the 3D touch) is located between the battery and the charging port. It's held down with two screws. To have a little bit more room to work with, it's recommended to remove this part before proceeding. We'll show you how to put it back after the battery is out.


Step 8.2

The less common and more troublesome way, only attempt this is if the other method (8.3) fails: Lever the battery up from the back assembly. Use your tweezers with its dull broad base downwards and lever the battery up. The adhesive is very strong and makes it difficult to loosen the battery. Try to lever the battery from various points along the left side of the phone up until the volume buttons. Avoid levering near the volume buttons as the volume button cable runs underneath the battery and could get damaged. This process can take up to 10-15 minutes. The battery might only loosen a tiny bit at a time. Be patient, move slowly and carefully. If the battery will not come loose from the adhesive, use a heat gun, a hair dryer or a warm halogen (LED is not warm enough) lamp to lightly heat the back (outer) side of the back assembly. An elevated temperature makes the battery loosen easier from the adhesive when levering. Do not heat it too much! If you can not hold and keep your finger on the back assembly, it is too hot!
Keep levering from different positions until the battery can be lifted out.
– Disadvantage: The battery is held very tightly to the adhesive and is often very troublesome to remove, even with heat applied. There is a risk of damaging the battery if levering it upwards uncarefully.

1. Do not lever the battery up from the right hand side where the motherboard is. By levering against the motherboard there is a significant risk of damaging components.
2. Do not lever the battery from the top left corner. The volume key cable runs underneath the battery and it gets easily damaged by the tweezers.
3. Do not puncture the battery. The battery can combust (catch on fire) if it is pierced or severely bent.
4. Use dull tools to work the battery.
5. If your original battery is swollen or damaged in any way, it is possible that its inner compartments are broken or compromised. This increases the risk of the battery combusting, even if it isn't pierced or punctured. 


Lever the middle/bottom left side of the battery upwards

Lever from different positions

Lever from different positions


Lever from different positions

(The iPhone has been turned 180 degrees) Avoid levering near this area where the volume button cable is

Step 8.3

8.3. Our recommendation: Lever the battery’s bottom left corner upwards a little bit, just enough to create a tiny gap between the battery and the back assembly. A little bit of heat from a heat gun or hair dryer can be used as explained in Step 8.2.
Gently pull the left adhesive strip, while holding its black and white end part, around the battery’s bottom left corner. Keep slowly pulling the adhesive down and outwards from the phone. Pull it slowly and work your way down the adhesive with your fingers while pulling. After the first adhesive strip is removed, remove the second one the same way.
Pull gently or else the adhesive can tear or break. If the adhesive strips rips, try to grab the end of it with the tweezers and keep pulling it like before. If the end piece can not be grasped with the tweezers, move back to Step 8.2.

IMPORTANT: Do not puncture the battery or bend it too much as it can combust if doing so. Take your time and do it slowly and gently.


Lever the middle/bottom left side of the battery upwards


Pull the adhesive slowly out from underneath the battery


Pull the adhesive gently around the battery's bottom left corner…


… and keep pulling it around the battery's left side



Keep pulling until the whole adhesive strip comes out


Remove the other adhesive strip in a similar fashion, but if it tears…


… try to grab the end of it with the tweezers and continue pulling


Removed adhesive strip



Step 9

Once the battery is removed, re-install the taptic enginge (if it was removed previously). When the taptic engine is in place, remove the plastic film protecting the battery then attach the battery adhesive to the battery. This process can be a bit tricky so take your time. The adhesive is very sticky and will easily stick to anything when its wrapper is removed. Make sure you’re ready to install it when you remove its plastic wrapper. If there is a see through plastic film/cover on the new battery, remove this film. Start at the pointy end of the adhesive and hold the end of each film. When slowly separating, one film will come off easily without stretching the adhesive or leaving bubbles. This the end film you want to remove. Separate the film from the adhesive slowly. Once the film is off, take the battery and align its bottom end to the black strip. Proceed by attaching the rest of the battery’s body to the adhesive. Then remove the two blue films that cover the adhesive on the black strips. Fasten the black strips to the end of the battery and then remove the last protective film. Now, put the new battery in the same spot (for illustrating purposes we will be using the same original iPhone 6 battery as we just removed) as the old one. Make sure the battery is spaced out and not directly adjacent to neither the metal assembly or the motherboard. Also make sure the battery’s connector is aligned to its receiving end on the motherboard. Then press the battery firmly down to the back assembly with your fingers to make it stick to the double-sided adhesive.
Do not connect the battery connector to the motherboard battery connector just yet, we will do this in Step 11.


Screw fasten the taptic engine

Remove the protective film from the battery


Remove the battery's protective plastic film

Start at the pointy end of the adhesive and one of the films will come off easy (in this case, the blue colored film)

Do NOT remove the film from the non-pointy end yet

First film removed

Put the battery in place

Align and fasten the battery’s bottom end to the adhesive

Remove the protective film from the battery

Flip the battery and make sure the adhesive is fastened

Remove the two small blue films

Once the blue films are removed, attach the black strips to the battery

Remove the last film slowly as the adhesive can stretch or come loose

Place the new battery in the old one’s place and make sure the battery’s connector can attach to the motherboard


Step 10

If you removed the front assembly (Step 6) it’s time to reconnect it (if you haven’t removed the front assembly, move on to Step 11). Reconnect the front assembly in a similar fashion as when you disconnected it. Hold it in place so that the top of the front assembly and the top of the back assembly are next to each other. Connect the LCD, touch, and front camera connectors to their respective connectors on the motherboard by putting them in place with your spudger and then connecting them with your index finger. You will hear a soft “click”-noise when they are properly connected. If the LCD, touch and/or sensor/front camera connector are not connected properly or if they get damaged, the LCD, touch and/or sensor/front camera functionality can be compromised.
If there are white lines/squares on the LCD after the battery replacement, the LCD connector is most likely dislocated or been damaged. If the lines/squares appear, disconnect the LCD connector once again and then reconnect. Make sure that it snaps into place correctly. It can take a while (15-60 minutes of use) after the connector is reconnected before the white squares/lines disappear entirely.


Step 11

Connect the battery connector to its connector on the motherboard.
Put the metal plates (one covering the LCD, touch, and front camera connector and the other plate covering the battery connector) in place and screw them fastened.


Fasten the battery connector


Put the metal cover back in place if you removed the front assembly


Screw the metal cover fastened


Put the metal battery cover in place and screw it fastened


Step 12

Put the top side of the front assembly to the top side of the back assembly at a 45 degree angle. Make sure the notches on the front assembly attach to the back assembly. Move the bottom side of the front assembly downwards towards the back assembly while making sure the top side of the front assembly is next to the top side of the back assembly.


Step 13

Gently press the front assembly downwards and click it together with the back assembly.
Screw fastened the two bottom screws.
You are now done.


Step 14

If the phone does not turn on immediately after the battery replacement, the battery could be completely discharged. Let the phone charge for 15 minutes – it can take this long before anything shows up on the screen if the battery is completely drained.

  • After a battery replacement, the time and date could be reset to factory default, 1st of January 1970.
  • Because of this the phone will not detect the SIM-card and will say “Searching…” in the top left corner.
  • Connect your phone to iTunes or a WiFi network and wait a few seconds until the time and date are automatically set.
  • Restart your phone.
  • It is now ready to be used.