iPhone 6 Battery Replacement

To prevent a fire hazard or explosion due to accidental puncture, ensure the lithium-ion battery's charge level is below 25% prior to beginning any disassembly procedures on your iPhone.
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 millimeters in length, which are situated adjacent to the Lightning connector.

For those utilizing the Anti-Clamp tool, the following two steps detail its use to simplify the disassembly process; otherwise, proceed six 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.
Carefully place a suction cup on the front of the iPhone, close to the lower edge and directly over the home button, and another suction cup on the rear, in the same relative position.
Apply vacuum to the targeted surface by pressing the cups firmly against each other.
To improve the Anti-Clamp's grip if the iPhone's exterior feels excessively slick, apply adhesive tape to the device's surface.

To secure the arms, advance the blue handle in its direction.
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 space is created by the Anti-Clamp, slide a separating tool beneath the display panel.
To ensure adequate separation, reposition the handle by 90 degrees.
Allow several seconds of settling time between each incremental tightening, limiting each adjustment to a maximum of 90 degrees. Permit the Anti-Clamp feature and time to facilitate proper seating.

Lacking an Anti-Clamp tool, secure the front panel with a single suction cup for lifting.
Position a suction cup directly on the display surface, situated slightly higher than the home button's location.
Ensure a firm, even contact between the cup and the screen surface to guarantee a leak-proof connection.
To facilitate suction cup attachment when a display exhibits severe cracking, apply a sheet of clear packing tape across the damaged area; as an alternative, a robust adhesive tape can be substituted for the suction cup. Should these methods prove ineffective, secure the suction cup directly to the fractured screen using superglue.

Using one hand to secure the iPhone, gently lift the suction cup to create a small gap between the front panel and the rear enclosure.
Exercise caution and use steady, even pressure when installing the display assembly, as its tolerances are significantly less forgiving than those typically found in other electronics.
Carefully separate the rear case from the display assembly by gently levering it downwards with a plastic opening tool, maintaining upward traction on the display with the suction cup.
To release the front panel assembly from the rear case, several retaining clips secure it in place, requiring the use of both the suction cup and plastic opening tool to carefully disengage it.

To detach the suction cup, depress the plastic projection to break the airtight seal.
Detach the display assembly's suction cup.

Using the phone's top edge as a pivot point, carefully separate the front panel assembly from the rear case by gently moving the home button end outward.
The front panel's upper edge incorporates multiple clips that function as a partial hinge.
Ensure the clips located immediately beneath the rear case's upper border are properly positioned before reattaching. Subsequently, move the front panel vertically, advancing it until its superior edge is level with the rear case's top edge.

Carefully position the display at a roughly 90-degree angle, then secure it in a supported position to prevent movement during the repair process.
If a suitable replacement is unavailable, a factory-sealed aluminum can containing a beverage can be temporarily utilized.
To avoid stressing the display's wiring during the repair process, secure it with a rubber band.

Using a Phillips screwdriver, detach the bracket securing the battery connector by unscrewing the included fasteners.
A single screw, measuring 2.2 millimeters, is required.
A single screw, measuring 3.2 millimeters, is required.
Carefully note the location of every screw during disassembly, as reassembly requires each one to be placed in its original position to prevent potential damage to the device.

Detach the bracket securing the battery connector using a tri-point screwdriver, ensuring no damage occurs to the connector or surrounding components.

Carefully lift the battery connector away from its connection on the logic board using a plastic opening tool, applying gentle force.
To avoid irreparable damage, focus your prying action solely on the battery connector itself; applying force to the logic board socket risks fracturing the connector.

Using a Phillips screwdriver, detach the cable bracket from the front panel assembly by unscrewing the five screws holding it in place.
Use three screws, each measuring 1.2 millimeters.
A screw with a 1.7 mm diameter is required.
A single screw with a 3.1 mm diameter is required.
Improper screw installation during reassembly can result in irreversible harm to the iPhone's logic board.

Detach the cable bracket securing the front panel assembly cable to the logic board.

When proceeding with the following four steps, ensure that you lift solely on the cable connectors themselves, avoiding any upward force applied to the sockets they connect to on the logic board.
Carefully detach the front camera and sensor cable connector from its socket using a spudger or similar tool.

Carefully detach the home button cable connector using a spudger or fingernail.

Prior to either detaching or reattaching the cable in this procedure, ensure the battery is disconnected.
Carefully separate the display data cable connector from its socket using a spudger or similar tool.
To avoid a blank screen or white lines after reassembly, ensure the display data cable remains securely attached to its connector; should this issue arise, restore functionality by re-engaging the cable and then performing a power cycle, which is most reliably achieved by briefly disconnecting and reconnecting the battery connector.

Carefully separate the digitizer cable connector from its socket using the flat spudger.
To avoid damaging the digitizer, ensure that when attaching the digitizer cable, pressure is applied to opposing ends of the connector rather than the central area; central pressure may warp the component.

Detach the front panel assembly by disengaging it from the rear case.

Carefully lift the adhesive securing the battery, starting at the lower-right corner.
Exercise caution and avoid using sharp tools; accidental contact with the battery presents a fire hazard and potential release of hazardous substances.
To ease battery strip removal, the vibrator can be detached; for this, two Phillips screws holding it in place should be unscrewed, and the vibrator then raised.

To ensure proper removal, maintain the strips' flatness and prevent any creases, as folds can cause them to adhere and tear rather than separate easily.
Gently draw the adhesive tab, moving it downwards towards the iPhone's base to release the battery.
Exercise caution during this step to prevent damage to the adhesive strip; ensure it doesn't catch on the vibrator or surrounding parts located close to the battery.
Apply continuous, even force to the strip, ensuring it remains taut as it disengages from the space between the battery and the rear case; to optimize the process, limit the pulling angle to 60 degrees or less.
Expect the strip to significantly extend beyond its initial size; to maintain tension, reposition your grip closer to the battery as needed while continuing to pull.
Should the pull tab fracture, attempt to recover the detached portion using tweezers, exercising caution to avoid battery damage, and proceed with pulling. If the strip breaks and remains inaccessible beneath the battery, move forward with the subsequent instructions.

Using a 5/32-inch hex key, carefully tighten the four M4x8 screws securing the fan assembly to the heatsink, ensuring a torque of 4 in-lbs is applied to each screw to prevent damage.
Apply the same procedure to the remaining strip.
To prevent the battery from being ejected unexpectedly during removal, maintain firm pressure on it while detaching the second strip.
Should the battery adhesive become detached and its remnants be inaccessible, carefully introduce a small quantity of isopropyl alcohol—with a concentration exceeding 90%—beneath the battery's edge, specifically targeting the location of the fractured adhesive strip(s).
Allow approximately one minute for the isopropyl alcohol to soften the adhesive securing the battery, then carefully separate the battery from the device casing using the spudger's flat edge.
To avoid damage, do not use excessive force when removing the battery. If the battery remains stuck, add additional alcohol drops to dissolve the adhesive bond. Ensure the pry tool does not compromise the battery's structural integrity by bending or puncturing it.
Applying force to the logic board can result in device damage.
To prevent damage to the volume control cable located beneath, avoid inserting the spudger between the volume down (-) button and the battery's top edge.
If the adhesive strips located beneath the battery are damaged or irretrievable, proceed to the subsequent instruction.

Carefully align the 4mm hex key to the setscrew, ensuring it engages fully, then gradually tighten the setscrew to a torque of 1.5 Nm using the hex key.
To free a battery adhered to the rear case, apply heat using an iOpener or a hair dryer, focusing on the area immediately behind the battery; the case's temperature should reach a level just beyond comfortable touch.
Carefully raise the battery from its compartment using a plastic opening tool.
Exposure to excessive heat poses a risk of battery ignition in the iPhone.
If the battery adheres firmly to the rear case, turn the iPhone over and carefully slide dental floss or strong string between the battery and the case. Gently move the floss back and forth, using a sawing action, to loosen and release the adhesive bond.
For cleaning between teeth, a guitar string—specifically a 0.009 inch E string from a 12-string guitar set—can be used as a robust substitute for traditional floss.

Carefully align the 4mm hex key to the setscrew, ensuring it engages fully, then gradually tighten the setscrew to a torque of 1.5 Nm using the torque wrench.
Disconnecting the iPhone's internal battery requires careful attention to avoid damage; therefore, proceed to detach it.
Carefully slide the protective plastic covering off the new battery, ensuring you don't snag or damage the ribbon cable during removal.
To prevent damage, ensure any residual alcohol solution is completely removed by wiping with a clean cloth or permitting full evaporation before proceeding with the new battery installation.
To confirm correct positioning within its designated space, briefly plug the battery connector back into the logic board's 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 secure a battery lacking factory-applied adhesive, follow the instructions detailed in this guide for adhesive strip replacement.
Following reassembly, execute a complete system reset to mitigate potential problems and streamline any subsequent diagnostic procedures.