100% Battery Health
The battery is reporting its full estimated original capacity. This is typical of a new battery, although actual runtime also depends on usage and device settings.
What Is a Good Smartphone Battery Health Percentage?
Wondering whether your phone battery is still in good condition? Understanding your good smartphone battery health percentage can help you decide whether to keep using your device or consider a battery replacement.
Battery health measures how much charge your battery can hold compared with when it was new. Over time, normal battery ageing reduces its capacity, meaning your phone may need charging more frequently.
What Is a Good Battery Health Percentage?
Your smartphone battery health percentage indicates how much charge your battery can hold compared with when it was new. Use this visual guide to understand what your battery health reading may mean.
Excellent
Good
Fair
Low
90% Battery Health
Generally a good reading. Some capacity loss is normal as your smartphone battery ages, and everyday performance may remain satisfactory.
80% Battery Health
Your battery has lost some of its original estimated capacity. Consider its runtime and your phone manufacturer's guidance when deciding whether to arrange a battery assessment.
Below 80% Battery Health
Battery life may be noticeably shorter. If you also experience rapid drain, unexpected shutdowns or a service warning, consider having the battery checked by a qualified technician.
Important: These percentages are general guidelines,
not universal replacement rules. Battery health reporting differs
between smartphone brands and models. A reading below 80% does not
automatically mean that you must replace your battery.
Tip: On iPhone, look under Settings > Battery > Battery Health or Battery Health & Charging. On Android, check your phone's battery settings or manufacturer's diagnostic tools.
How to Check My Phone's Battery Health
Performing a phone battery health check helps you understand your battery's condition before deciding on a replacement. Follow the steps below for your device.
For iPhone
iPhone provides a built-in battery health menu on supported models and iOS versions.
1
Open Settings on your iPhone.
2
Tap Battery.
3
Select Battery Health or Battery Health & Charging, depending on your iOS version.
4
Check Maximum Capacity and look for any battery service recommendations.
Settings path:
Settings → Battery → Battery Health
Settings → Battery → Battery Health
For Android
Battery health menus vary between manufacturers. Start with your device's settings.
1
Open Settings and look for Battery or Battery Health.
2
Check whether your phone displays battery health, battery status or maximum capacity.
3
If no health percentage is available, consult your manufacturer's diagnostic tools or support guidance.
Examples by manufacturer
Samsung Galaxy
Look under Settings → Battery or Device Care. Samsung Members diagnostics may provide battery status.
Xiaomi / Redmi
Check Battery settings and available battery information. Options vary by model and software version.
OPPO
Look in Battery settings for a Battery Health option if supported by your device.
Tip:
Not every Android phone displays an exact battery health percentage.
Not every Android phone displays an exact battery health percentage.
Important: Menu names and available features vary
by smartphone model and software version. Some Android phones show
battery status rather than an exact health percentage.
Is your phone damaged?
Battery health and physical damage are different issues. If you're considering trading in a damaged phone, read our guide: Damaged Phone Trade-In: What's Acceptable?
Battery health and physical damage are different issues. If you're considering trading in a damaged phone, read our guide: Damaged Phone Trade-In: What's Acceptable?
When Should You Consider Phone Battery Replacement?
A low battery health percentage does not automatically mean you need a new battery. Your phone's real-world performance and any battery warnings can also help determine whether a professional assessment is appropriate.
Consider a professional battery assessment if your phone experiences rapid battery drain, unexpected shutdowns, noticeably reduced runtime or a battery service warning.
These symptoms can indicate that your battery has degraded significantly, although other hardware or software issues can sometimes cause similar problems.
Battery swelling warning:
If your battery appears swollen or your phone's body is
separating, stop using and charging the device and seek
professional assistance promptly.
Check the replacement cost first
Before arranging phone battery replacement, check your warranty, available service options and the expected replacement cost. iPhone battery cost varies by model, location and service provider, so check the manufacturer's current service information for an accurate estimate.
Want to improve your charging habits?
Learn more about how charging your phone to 80% may affect battery health in our guide: Does Charging to 80% Really Improve Battery Health?
Learn more about how charging your phone to 80% may affect battery health in our guide: Does Charging to 80% Really Improve Battery Health?
How Can You Maintain Good Smartphone Battery Health?
You cannot prevent battery ageing completely, but sensible charging habits may help reduce unnecessary wear. Follow these practical tips to take better care of your smartphone battery.
1. Manage Heat
- Avoid exposing your phone to excessive heat.
- If your phone gets unusually hot while charging, disconnect it if safe to do so and let it cool naturally.
- Keep your phone in a cool, well-ventilated place.
Tip: Heat is an important factor in
lithium-ion battery ageing.
2. Optimise Charging
- Enable optimised charging or a charge limit when available.
- You do not need to charge to 100% every time.
- Choose a charging routine that suits your daily usage.
Tip: Charging limits can help reduce the
time your battery spends at a high charge level.
3. Use Compatible Accessories
- Choose reputable chargers and charging cables.
- Use accessories compatible with your smartphone.
- Avoid damaged cables, loose connectors and questionable chargers.
Tip: Good-quality, compatible accessories
support safe and reliable charging.
4. Build Daily Habits
- Avoid leaving your phone in a hot car or direct sunlight.
- Keep your phone's software updated where practical.
- Monitor battery performance and investigate unusual changes.
Tip: Small, consistent habits can help
reduce unnecessary battery stress over time.
Focus on Battery Care, Not Perfection
You do not need to keep your battery between fixed percentages at all times. Focus on managing heat, using available charging features and using your phone comfortably.
Looking for a phone with longer battery life?
Battery capacity and power efficiency can affect how long a phone
lasts between charges. Explore our guide:
Best Phones for Battery Life
.
Frequently Asked Questions
Have questions about smartphone battery health? Find answers to common questions about battery percentages, charging habits and when to consider a replacement.
Is 85% battery health good?
Generally, yes. An 85% battery health reading indicates that the battery's estimated maximum capacity is lower than when it was new, but it may still perform adequately. Consider your phone's daily runtime, performance and any battery service warnings when assessing its condition.
Should I replace my battery at 80%?
Not necessarily. An 80% reading can be a useful reference point, but it is not a universal replacement rule. Consider the manufacturer's recommendations, battery runtime, unexpected shutdowns and other symptoms before deciding whether to replace your battery.
Does charging to 100% damage my phone battery?
Charging to 100% is normal and does not automatically damage your phone battery. However, spending extended periods at a high charge level, particularly in hot conditions, can contribute to battery ageing. Optimised charging and charge limit features may help reduce this effect when available.
Final Takeaway
Knowing what constitutes good smartphone battery health helps you make informed decisions about battery maintenance and replacement. Check your device's battery information, monitor real-world performance and compare repair costs before buying a replacement battery.