iPhone Battery Replacement Guide

Before starting, complete these safety steps: • **Discharge battery below 25%** - Lithium batteries can catch fire if punctured while charged • **Power off your iPhone completely** - Hold power + volume, slide to power off • **Work on a clean, static-free surface** - Use an anti-static mat if available • **Have good lighting** - You'll be working with tiny components • **Take your time** - Rushing leads to mistakes **Important:** Back up your phone before starting. While this repair shouldn't affect data, it's always better to be safe.

Locate the two pentalobe screws on either side of the Lightning/USB-C port at the bottom of your iPhone. • Use the **Pentalobe P2 screwdriver** • Turn counter-clockwise to remove • These screws are very small - work over a white surface so you can find them if dropped • Place screws on magnetic mat or tape them down in order **Screw sizes vary by model:** - iPhone 8-11: 3.5mm screws - iPhone 12-15: 3.7mm screws

This is the trickiest part - go slowly. **Option A: Suction Cup Method** 1. Apply suction cup near the bottom of the screen, above the home button area 2. Pull up firmly while prying with a plastic tool at the edge 3. You'll hear a slight pop as the clips release **Option B: Heat Method (recommended for older phones)** 1. Apply heat around the edges for 1-2 minutes (hair dryer on low, or iOpener) 2. This softens the adhesive seal 3. Then use suction cup method **CRITICAL WARNINGS:** ⚠️ DO NOT separate more than 90° - cables connect screen to body ⚠️ iPhone X and later: Display cables are on the LEFT side ⚠️ iPhone 8 and earlier: Display cables are on the RIGHT side

Before touching anything else, you MUST disconnect the battery. 1. Locate the metal bracket covering the battery connector 2. Remove the screws holding this bracket (usually 2-3 Phillips screws) 3. Set bracket and screws aside (keep organized!) 4. Use plastic spudger to gently pry up the battery connector 5. Fold connector out of the way **Why this matters:** Working on a phone with battery connected risks short circuits that can fry components.

For easier access, you can fully remove the display: 1. Remove the bracket covering the display cables (2-4 screws) 2. Carefully disconnect each ribbon cable by prying up gently 3. Lift display away from phone body **Display cables to disconnect:** - Battery (already done) - Display data cable - Digitizer cable - Front camera/sensor cable (some models) **If you choose NOT to remove display:** - Prop it up at 90° against a stable object - Be very careful not to strain the cables

iPhones use adhesive pull tabs to secure the battery. **Pull Tab Method:** 1. Locate the black pull tabs at the bottom edge of battery 2. Pull slowly and steadily at a low angle (almost parallel to battery) 3. If tab breaks, try from another tab 4. The adhesive should stretch and release **If pull tabs fail:** 1. Apply heat to the back of the phone (warm, not hot) 2. Use plastic card to gently pry battery up 3. Start from one corner and work around 4. NEVER use metal tools - risk of puncture **DANGER:** If you puncture the battery, it may catch fire. If you see smoke or smell chemicals, move away immediately.

Now for the satisfying part - installing your new battery. 1. **Apply new adhesive strips** to the battery well (if not pre-applied to battery) 2. **Align the battery** - connector should line up with socket 3. **Press battery firmly** into place 4. **Connect battery cable** - press down until it clicks 5. **Replace battery bracket** and screws **Check your work:** - Battery should sit flat, not bulging - Connector should be fully seated - No cables pinched underneath

Reverse the disassembly process: 1. **Reconnect display cables** (if removed) - Each cable should click into place - Replace the bracket and screws 2. **Connect battery** and replace bracket 3. **Close the display** - Start at the top edge - Work around the edges, pressing gently - You should hear/feel clips engaging 4. **Replace bottom screws** - Pentalobe screws go back in the same holes **Before fully closing:** - Turn on phone to verify display works - Check touch response - If something doesn't work, reopen and check connections

For best battery life and accurate readings: **First Charge Cycle:** 1. Charge to 100% without interruption 2. Use phone normally until it dies (0%) 3. Charge back to 100% **Expected Behavior:** - Battery health may show "Unknown" for 1-2 weeks - iOS needs time to calibrate the new battery - This is normal and will resolve itself **If you see "Important Battery Message":** - Non-Apple batteries will show this warning - Functionality is not affected - It's just Apple's way of noting non-genuine parts **Your repair is complete! 🎉**