How to spot the signs your iPhone battery needs replacing
Apple's iOS lets users check their iPhone's battery health directly, and several clear symptoms can signal it's time for a replacement.
Every battery degrades over time due to charge cycles, age, temperature and usage patterns, and even Apple's engineering can't stop this chemical process. Fortunately, iPhone owners have built-in tools to catch problems early.
Checking battery health
Under Settings > Battery > Battery Health, users can see whether their battery status is Normal or Significantly Degraded, the latter coming with an on-screen suggestion to replace the battery. On iPhone 15 and newer, the screen also shows the total charge cycle count — iPhone 14 and earlier models are designed to hit 80 percent capacity around 500 cycles, while newer models extend that to 1,000 cycles. Once maximum capacity compared to a new battery drops below 80 percent, Apple considers the battery worn out and recommends replacement.
Other warning signs
Needing a power bank just to get through the day, battery percentage dropping unusually fast, or unexpected shutdowns even when charge is well above single digits are all signs of trouble. Sluggish performance during demanding tasks such as gaming, exporting large videos or streaming 4K content can mean the phone is throttling itself to avoid shutting down. A device that heats up quickly even when unplugged or barely used suggests the battery is being overworked. If the battery visibly bulges out of its case, users should stop using the phone immediately and contact Apple Support, since this poses a safety hazard.
Replacement costs outside an AppleCare plan range from $69 to $129 depending on the model, while an active AppleCare subscription covers replacement at no extra service fee once capacity falls below 80 percent.
