iPhone Battery Replacement Guide
Battery draining fast? Phone dying at 30%? This guide walks you through replacing your iPhone battery yourself.
To replace an iPhone battery, power off the phone, remove the two bottom pentalobe screws, open the display, disconnect the battery, and peel out the old battery using its adhesive pull-tabs. Install the new battery on fresh adhesive, reconnect, and reassemble. It takes 20-30 minutes and about $15-30 in parts. Stop and see a pro if the battery is swollen.
As an Amazon Associate we earn from qualifying purchases. This costs you nothing extra and helps keep this site free.
⚡ Make Your Battery Last Longer
Quality chargers and cables extend battery cycles by 30–50%.
Counterfeit chargers cook batteries — buy MFi-tested
Cheap counterfeits push wrong voltage and shorten battery life
Top up on the go without burning battery cycles
Microfiber + brush + alcohol wipes
- Lithium batteries can catch fire if punctured — be careful!
- Never pry directly on the battery
- If battery is swollen, take it to a professional
🛠️ What You'll Need
Match your exact iPhone model
View on Amazon →Pentalobe screwdriver, pry tools, suction cup
View on Amazon →Usually included with battery — secures it in place
📋 Step-by-Step Instructions
Power Off & Remove Bottom Screws
Turn off your iPhone. Remove the two pentalobe screws next to the charging port.
Open the Display
Use suction cup to lift the screen from the bottom. Open it like a book — the screen hinges at the top.
Disconnect the Battery
Remove the bracket covering the battery connector (2-3 screws). Disconnect the battery cable using a plastic pry tool.
Remove Adhesive Tabs
The battery is held down by adhesive strips. Locate the pull tabs at the bottom of the battery. Pull slowly and steadily — if they break, apply heat (hair dryer) to soften the adhesive.
Install New Battery
Apply new adhesive strips to the phone (not the battery). Press the new battery into place firmly.
Reconnect & Reassemble
Connect the battery cable. Replace the bracket. Close the display and reinstall the bottom screws.
Calibrate the New Battery
Charge to 100%, use until it dies, then charge to 100% again. This helps the battery gauge calibrate properly.
⚠️ When to Get Professional Help
- Battery is swollen or bulging
- Adhesive tabs broke and battery won't budge
- You're not comfortable working near lithium batteries
- Phone still has issues after battery replacement
Need a Pro?
Our partner technicians can do this repair with a 30-day warranty.
📞 (856) 914-1074 PC Medics of NJ • South Jersey📦 Mail-In Repair Service
Not comfortable doing this yourself? Send your device to a professional repair shop.
🛒 Recommended Products
The #1 repair kit — 64 bits, pro tools, lifetime warranty
EZ Fit tray — foolproof install, 9H tempered glass 2-pack
Charge iPhone, Watch & AirPods — one compact cube
📖 Related Buying Guides
Frequently Asked Questions
How much does it cost to replace an iPhone battery yourself?
A DIY iPhone battery replacement typically costs about $15 to $30 in parts, including the battery and adhesive strips. You will also need a basic repair kit with a pentalobe screwdriver, pry tools, and a suction cup if you don't already own one.
How long does it take to replace an iPhone battery?
For most people the job takes about 20 to 30 minutes. The trickiest part is removing the old adhesive pull-tabs without breaking them, so work slowly and patiently.
When should I replace my iPhone battery?
Consider a replacement when the battery drains fast, the phone shuts down unexpectedly, or performance slows. Checking Battery Health in Settings can confirm degraded capacity.
Is it safe to replace an iPhone battery myself?
Yes, if you are careful. Lithium batteries can catch fire if punctured, so never pry directly on the battery. If the battery is swollen or bulging, do not attempt it yourself and take it to a professional.
Do I need to calibrate a new iPhone battery?
It helps. Charge the new battery to 100%, use the phone until it dies, then charge to 100% again so the battery gauge calibrates and reports an accurate percentage.