How to replace your iPhone 5 battery

Begin by disconnecting the power supply, ensuring it's unplugged from the outlet, then carefully remove the 10mm retaining bolt securing the fan assembly to the motor shaft, utilizing a socket wrench.
To avoid injury and contain shattered fragments while working, secure any cracked display glass with tape.
Apply strips of transparent packing tape across the iPhone screen, ensuring complete coverage by layering them to overlap.
To safeguard your eyes from potential glass fragments released during the repair process, always use safety glasses.

Using a 5/32-inch hex key, carefully loosen the four screws securing the fan assembly to the motor housing; ensure you do not overtighten when reassembling, and be aware that the fan blades are sharp.
To ensure safety, fully deplete the iPhone's battery until it registers below 25% charge prior to continuing; a lithium-ion battery that is fully charged presents a fire and/or explosion hazard if damaged.
To prevent electrical shock or damage, ensure the iPhone is completely de-energized prior to starting the repair process.
Using a Pentalobe screwdriver, detach the two screws measuring 3.6 mm located adjacent to the Lightning connector.

Using a 5/32-inch hex key, carefully tighten the retaining screw on the motor assembly to a torque of 3.5 Nm, ensuring that the motor shaft aligns correctly and avoiding any damage to the threads; observe caution to prevent over-tightening.
Carefully lift the display assembly—consisting of a glass screen, a plastic bezel, and integrated metal clips—from within the phone's chassis during the subsequent procedures.
Ensure complete removal of the display assembly, irrespective of the tool selected.
When the glass and plastic layers detach, mirroring the depiction in the initial image, use a plastic opening tool to carefully disengage the metal clips from the plastic frame by inserting it between the frame and the phone's metal chassis.
To ensure proper closure when reattaching a display bezel, apply a narrow adhesive strip positioned between the plastic bezel and the glass.

Using a 5/32-inch hex key, carefully tighten the retaining screw on the motor assembly to a torque of 3.5 Nm, ensuring to observe all safety precautions regarding pinch points.
For those utilizing the Anti-Clamp tool, the following two actions detail its use to simplify the opening process; otherwise, proceed two steps further to access an alternative procedure.
Refer to the included guide for detailed procedures regarding Anti-Clamp operation.
To release the Anti-Clamp's arms, move the blue handle in a rearward direction.
Position the arms so they extend across the iPhone's left or right side.
Secure two suction cups, one to the front and one to the rear surface of the iPhone, placing them close to the lower edge, directly above the home button.
Apply vacuum by pressing the cups firmly against the surface you intend to work on.
To improve the Anti-Clamp's grip if the iPhone's exterior feels excessively smooth, apply adhesive tape to the device's surface.

Using a 5/32-inch hex key, carefully tighten the three retaining screws on the motor assembly to a torque of 3.5 inch-pounds, ensuring you do not overtighten and damage the threads.
To secure the arms, advance the blue handle in the direction indicated.
Rotate the handle fully, completing a 360-degree turn, observing for the initial expansion of the cups.
Maintain parallel positioning of the suction cups; should misalignment occur, gently release the suction cups' grip and reposition the arms.
Once sufficient separation is achieved by the Anti-Clamp tool, slide a separation tool beneath the display panel.
To ensure adequate separation, increase the heat applied to the component and then rotate the handle 90 degrees.
Allow the Anti-Clamp device to function for a full minute after each adjustment, and limit each rotation to a maximum of 90 degrees.

Securely affix a suction cup to the display surface, positioning it directly over the home button area.
Ensure the entire cup makes contact with the screen surface to guarantee a secure seal.
To prevent further glass fragmentation and facilitate a secure grip for the suction cup, apply several strips of packing tape to the face of iPhones with cracked glass, carefully smoothing to eliminate any trapped air.

Securely affix the suction cup to the front panel assembly.
Using one hand to secure the iPhone, lift the suction cup vertically to gently create a small gap between the front panel and the rear enclosure.
Exercise caution and use steady, even pressure when installing; the display assembly fits considerably more snugly than typical device components.
Using a plastic opening tool, carefully separate the rear case from the display assembly by gently levering it upwards, simultaneously lifting with the suction cup.
To release the front panel assembly from the rear case, carefully detach the multiple retaining clips by employing both a suction cup and a plastic opening tool as needed.

Carefully work a prying tool around the front panel assembly's perimeter to release the retaining clips located on the left and right edges.

Disconnecting the front panel assembly entirely from the rear case is not recommended, because delicate ribbon cables remain connected at the top of the iPhone.
After disengaging the retaining clips located along the lower edge and sides of the front panel assembly, separate the assembly's lower section from the rear case by gently pulling downwards.
Carefully position the display at a roughly 90-degree angle, then secure it in an upright position using a support to prevent it from falling during the repair process.
To avoid stressing the display's wiring during the repair process, secure it with a rubber band.

Using appropriate tools, detach the two screws that fasten the metal bracket holding the battery connector to the logic board.
Use a Phillips screwdriver to remove a single screw with a 1.8 mm head.
Use a Phillips screwdriver to remove a single screw with a 1.6 mm head.

Detach the bracket securing the battery connector using a tri-point screwdriver.

Carefully lift the battery connector away from its corresponding socket on the logic board, utilizing a plastic opening tool to avoid damage.
Exercise caution to avoid shifting the tiny components positioned near the socket.
Exercise extreme caution when releasing the battery connector, ensuring you apply force solely to the connector and avoid contact with the logic board socket; applying pressure to the socket or the board could result in socket destruction or damage to adjacent components.

Detach the cable bracket from the logic board by unscrewing the screws listed below.
Use two Phillips screws, each measuring 1.2 mm.
Use a Phillips screwdriver to remove a single screw with a 1.6 mm head.
Due to its non-magnetic properties, this screw requires a regular screwdriver for removal; be cautious to prevent loss and ensure correct reinstallation, as a magnetized screw can disrupt compass functionality.

To detach the display cable bracket, raise it in the direction of the battery, then take it away from the iPhone.
To reassemble, position the bracket outward while securing it with the left-hand hooks on the logic board.

Prior to either detaching or reattaching the cables in this procedure, ensure the battery is disconnected.
Carefully detach the three front panel assembly cables by gently separating them using a plastic opening tool or your fingernail.
The cable connecting the front camera and its associated sensor
Connect the display panel's flat, ribbon-like cable, ensuring proper alignment with the corresponding connector pins, and secure it with the retaining clip to prevent accidental disconnection.
The flexible ribbon cable connecting the display's touch sensor to the device's mainboard is referred to as the digitizer cable.
Should the LCD cable become detached from its connector during reassembly, the display may exhibit white lines or fail to illuminate upon powering on; to resolve this, re-establish the cable's connection and restart the device, ideally by disconnecting and reconnecting the battery to ensure a complete power cycle.

Detach the front panel assembly from the rear case.

Gently lift the battery from its adhesive backing by grasping the visible, transparent plastic tab.
Should the battery's adhesive prevent easy separation, or if the battery tab fractures during removal, carefully introduce a small quantity of isopropyl alcohol—with a concentration exceeding 90%—beneath the battery's edge.
Allow approximately one minute for the alcohol to dissolve the adhesive securing the battery. Then, carefully use an opening tool to pry the battery up from its edge.
To prevent damage, avoid using excessive force when removing the battery; instead, if the adhesive resists, add additional alcohol droplets to loosen it. Ensure the battery remains intact and undamaged during removal—do not bend, puncture, or otherwise compromise its structure with the pry tool.
To prevent damage, ensure any residual alcohol solution is completely removed by wiping with a clean cloth or by permitting full evaporation prior to battery installation.
To assist with battery separation if adhesion remains problematic, apply warmth to the iPhone’s rear case using an iOpener or hair dryer to loosen the adhesive.
Exposure to excessive heat presents a fire risk for the iPhone's battery.

Carefully lift the battery from its compartment using the plastic opening tool, focusing exclusively on the outer perimeter of the device; avoid applying force to any other area, particularly in the vicinity of the logic board, as this could cause damage.
To facilitate battery removal, if initial attempts are unsuccessful, carefully add additional isopropyl alcohol as needed.
To prevent damage and potential fire risk, carefully release the battery, applying consistent, light pressure across its surface.
To prevent damage to the volume control cables, avoid using a prying tool on the battery's upper edge.

Disconnect the power source by extracting the battery.
Carefully discard the protective plastic packaging that accompanied the new battery by gently separating it from the ribbon cable.
To guarantee correct positioning within its designated space, briefly reattach the battery connector to the motherboard socket prior to securing the new battery.
Secure the battery in place, then sever its electrical connection before proceeding with the remaining assembly steps.
To avoid component damage during front panel reinstallation, ensure the battery makes full contact with the rear case.
Following reassembly, execute a complete system reset to proactively avoid potential problems and streamline any future diagnostic procedures.