Found your battery health % in Settings → Battery → Battery Health? Check what it means.
iPhone 15 and later: Settings → General → About → Cycle Count (or Settings → Battery → Battery Health on some iOS versions). iPhone 14 and earlier don’t show it in Settings, so leave it blank.
What is a good battery health percentage on iPhone?
Anything from 80% up is normal, working battery health. Apple designs iPhone 15 batteries to keep 80% of their original capacity after about 1,000 full charge cycles, and iPhone 14 and earlier after about 500. It hasn’t published a figure for newer models. Below 80%, Apple considers the battery significantly worn, and that’s when a replacement is worth it. Enter your percentage and your iPhone’s age above to see if yours is wearing faster than normal.
How to Use the iPhone Battery Health Checker
Your iPhone shows a battery health percentage, but it doesn’t tell you whether that number is good for a phone your age. This free iPhone battery health checker turns it into a plain verdict — Excellent, Good, Fair, or Consider Replacement — with next steps for your result.
- Find your battery health. Open Settings → Battery → Battery Health (called Battery Health & Charging on some iOS versions) and note the Maximum Capacity percentage.
- Enter your iPhone’s approximate age in months.
- Optional: add your cycle count. Pick your iPhone and enter the cycle count from Settings → General → About (iPhone 15 and later). iPhone 14 and earlier don’t show it, so leave it blank.
- Read your verdict and the recommended next steps.
What Your Battery Health Percentage Means
Maximum Capacity compares how much charge your battery can hold now against when it was new. All lithium-ion batteries lose capacity as they age and go through charge cycles, so a slowly falling number is normal, not a fault. Apple explains how this works, and what it means for performance, in About the battery and performance of iPhone.
- Excellent (95% and up) — performing close to new.
- Good (85–94%) — normal wear. You may notice slightly shorter screen-on time.
- Fair (80–84%) — degradation is noticeable. Start budgeting for a replacement.
- Consider Replacement (below 80%) — the point where Apple considers capacity significantly degraded and a new battery will restore full-day use.
The checker also compares your percentage with what’s typical for your iPhone’s age, so you can tell whether your battery is wearing faster than expected. If you add your cycle count, it also checks your health against Apple’s rating: 80% after 1,000 cycles for iPhone 15 models and after 500 for iPhone 14 and earlier. Apple hasn’t published a rating for newer models, so the checker compares them with 1,000 and says so.
Symptoms That Point to a Worn Battery
A low number usually shows up in daily use before you ever check Settings. Watch for:
- Shutting down with charge still showing — see why an iPhone dies at 20 percent.
- Heavy drain while idle — see iPhone battery drains overnight.
- Lag or slow app launches — see our iPhone running slow guide.
If your battery health is still good but battery life is poor, the cause is more likely software or a specific app — our guide on which apps actually drain iPhone battery shows how to find it.
When to Replace Your Battery
If your verdict is Fair or Consider Replacement and the symptoms above are affecting your day, a battery replacement is usually the cheapest way to make an older iPhone feel new again. Apple’s iPhone battery service page shows current pricing for your model, and our iPhone repair cost estimator compares Apple with independent shops.
Frequently Asked Questions
Is 80% battery health bad?
Not bad, but it’s the point where replacement becomes worth considering. Your iPhone still works normally; you’ll just get noticeably less time between charges.
How can I slow down battery wear?
Avoid extreme heat, and consider Optimized Battery Charging or a Charge Limit — Apple explains both in About Charge Limit and Optimized Battery Charging.
Is the battery health percentage exact?
No — iOS reports an estimate, so treat small changes as noise and watch the longer-term trend. For everything else battery-related, see our complete iPhone battery and charging guide.