As a tech repair expert with years of experience helping iPhone users, I've seen how aging lithium-ion batteries lose capacity, leading to frustrating drain—especially during long days out. Fortunately, options abound: upgrade, carry a power bank, or replace the battery directly.
To assess your battery's health, navigate to Settings > Battery > Battery Health. Here, you'll see the maximum capacity percentage. A prominent alert at the top signals if replacement is needed.
Once confirmed, choose DIY or professional service like Apple. DIY risks voiding warranty and damaging your device but is feasible with guides. Professionals ensure safety and preserve features like water resistance.
For hands-on users, start with trusted resources like iFixit, which offers model-specific guides (e.g., for iPhone 11). YouTube tutorials provide visual step-by-steps: unscrew the back, heat the edge, use suction cups to lift the screen, then swap the battery.
Essential tools cost about $13—iFixit recommends their iSclack suction tool. Amazon kits run $25+. Note: Opening voids water resistance, and non-Apple batteries may trigger warnings or disable Battery Health.
Apple handles replacements reliably per their site. Free if under warranty/AppleCare+ with a faulty battery. Otherwise, pay $49 for iPhone SE (2nd gen) to 8 Plus, or $69 for newer models.
Visit an Apple Store (same-day or 3-5 days) or mail-in (includes $6.95 shipping fee post-warranty; they provide the box). Apple service maintains water resistance.
Local third-party shops are alternatives—vet reviews and confirm water-sealing adhesives.
Updated September 17, 2021 3:45 PM ET: Originally published December 21, 2017; updated for service changes, devices, and iOS.
