iPhone 4S Battery Replacement
Due to the limited number of steps needed to access the battery in the iPhone 4S, the replacement process is relatively straightforward; however, exercise caution if the battery exhibits swelling.
- To ensure peak functionality, complete the following calibration procedure for the battery once this installation is finished.
- Allow the battery to fully recharge, then continue the charging process for a minimum of 120 additional minutes.
- Operate the iPhone until the power management system initiates a complete shutdown because the battery's charge has reached a critically low level.
- Ensure a complete, continuous power supply until the battery indicator displays a full charge, reaching 100%.
Step 1 | Rear Panel
To start, ensure the iPhone's battery is depleted to less than 25% capacity; a fully charged lithium-ion battery 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 P2 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.
To prevent damage, ensure the driver is firmly engaged with each Pentalobe screw before turning, as these screws are prone to stripping.
To prevent electrical shock or damage, ensure the iPhone is completely de-energized prior to starting the repair process.
Using a Pentalobe P2 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.
To prevent damage, ensure the driver is firmly engaged with each Pentalobe screw before turning, as these screws are prone to stripping.
Step 2
Apply pressure to the back cover, directing it upwards against the device's upper rim.
Expect a displacement of approximately 2 millimeters.
Expect a displacement of approximately 2 millimeters.
Step 3
Carefully detach the rear panel from the iPhone's casing, taking precautions to avoid breakage of the plastic clips affixed to the rear panel.
Carefully detach the iPhone's back cover.
Carefully detach the iPhone's back cover.
Step 4 | Battery
Using appropriate tools, detach the battery connector from the logic board by unscrewing the specified fasteners.
Use a PH00 Phillips screwdriver to loosen a 1.7 mm screw.
Utilize a PH00 Phillips screwdriver to loosen and remove a 1.5 mm screw.
Use a PH00 Phillips screwdriver to loosen a 1.7 mm screw.
Utilize a PH00 Phillips screwdriver to loosen and remove a 1.5 mm screw.
Step 5
Gently disengage the pressure contact from the battery connector, ensuring it moves completely clear of its retaining location.
Carefully detach the pressure contact.
Carefully detach the pressure contact.
Step 6
- Carefully disconnect the battery connector from its corresponding socket on the logic board by leveraging a plastic opening tool.
Using the tool, gently separate the connector's metal cover from the loudspeaker enclosure by inserting the tip in the gap and raising the connector's lower edge.
To detach the battery connector, move it straight up away from the logic board; avoid any lateral pressure.
Avoid applying force directly to the battery connector's socket to prevent separation from the logic board, as it is secured by four tiny solder joints.
Step 7 | Reassembly tip
- Ensure the pressure contact is correctly situated during reassembly, resting atop the indicated Philips screw post, with the gold contact oriented toward the battery connector.
To prevent wireless interference caused by oils from handling, thoroughly wipe the pressure contact using a cleaning agent like Windex or isopropyl alcohol.
Step 8
- Using a plastic opening tool, carefully wedge the tip into the gap separating the battery from the iPhone's outer casing, positioning the tool close to the device's lower edge.
Using the plastic opening tool, carefully work along the right side of the battery, lifting gently at multiple locations to release the adhesive that holds it in place within the outer case, ensuring full separation.
To loosen a firmly adhered battery, carefully introduce a small amount of isopropyl alcohol with a concentration exceeding 90% beneath its perimeter.
Allow approximately 60 seconds for the isopropyl alcohol to reduce the bond strength of the adhesive.
Carefully raise the battery using the flat, plastic tip of a specialized opening tool.
To prevent damage, avoid using excessive force when removing the battery. Should the adhesive still resist, add additional alcohol droplets to soften it. Ensure the pry tool does not compromise the battery's structural integrity by bending or puncturing it. - To prevent damage, ensure all traces of the alcohol solution are removed by wiping with a clean cloth or let it evaporate completely prior to battery installation.
Step 9
- Carefully lift the battery from its adhesive backing by grasping the visible, transparent plastic tab.
Exercise caution when drawing back the plastic pull tab, as it is susceptible to tearing with minimal force.
Disconnect the power source by detaching the battery.
Carefully detach the protective plastic covering from the new battery, ensuring you avoid any contact with the ribbon cable during removal.
Before installing the new battery, ensure the included cable is formed into the correct contour.
To verify correct positioning during battery replacement, briefly attach the battery connector to the device; after securing the battery with adhesive, detach the connector.
Following reassembly, execute a complete system reset to proactively avoid potential problems and streamline any subsequent diagnostic procedures.