You won’t see battery health on iPhones running iOS 11.2 or earlier; it appears only from iOS 11.3 onward in Settings > Battery > Battery Health & Charging.
Why isn’t my battery health showing?
Battery health only appears on iPhones running iOS 11.3 or later; older versions never displayed it
Here’s the thing: Apple didn’t include this feature until iOS 11.3 back in March 2018. To check if your phone has it, open Settings > Battery > Battery Health & Charging. If that menu’s missing, your device is probably stuck on an old OS version. Updating takes about one tap in Settings > General > Software Update. Honestly, this is one update you don’t want to skip—it gives you real insight into your battery’s capacity and whether performance throttling might be happening Apple Support.
Does iOS 11 show battery health?
No; battery health visibility starts only from iOS 11.3, so earlier iOS 11.x versions don’t show it
If your iPhone is still rocking iOS 11.2 or earlier, you’re out of luck—the Battery Health section simply doesn’t exist. The quickest fix? Update through Settings > General > Software Update. By 2026, nearly every active iPhone will run iOS 17 or later anyway, so this won’t be an issue for most people Apple Support.
How do I keep my battery 100% healthy?
Keep battery health high by optimizing charging habits, avoiding extreme heat, and limiting power-hungry features
Turn on Optimized Battery Charging in Settings > Battery > Battery Health & Charging to cut down on overnight wear.
Try to keep your charge between 20% and 80% most of the time; deep discharges and constant 100% top-ups do more harm than good.
Lower screen brightness, enable Low Power Mode when battery drops below 20%, and close unused apps manually.
Disable Background App Refresh and location services for apps that don’t need them in Settings > Privacy.
How can I check my Battery health?
Check battery health on iPhone via Settings > Battery > Battery Health & Charging; on Android, use Settings > Battery or third-party apps like AccuBattery
On iPhones, the Battery Health screen shows your maximum capacity, peak performance status, and service recommendations. Android users can peek at basic battery stats in Settings > Battery, but apps like AccuBattery or GSam Battery Monitor dig deeper—think charge cycles and wear patterns Android Help.
How can I check my phone Battery health?
On iPhone, use Settings > Battery > Battery Health & Charging; on Android, try *#*#4636#*#* or third-party apps
iPhone owners can find the relevant menu under Settings > Battery > Battery Health & Charging. Android users might stumble upon a hidden testing menu using *#*#4636#*#* in the dialer, but this trick is hit-or-miss—it often fails on newer devices and varies by manufacturer. When in doubt, stick with built-in menus or trusted third-party apps from the App Store or Google Play Store.
Is 90 a good battery health?
Yes; 90% battery health is considered good and should sustain normal use for 6–12 months or more
Battery capacity fades over time, so a 90% reading means your phone still delivers 90% of its original charge. Apple says most users see a 1–2% drop per year under typical conditions Apple Support. Heat, fast charging, and frequent full discharges? Those will speed up the decline.
Is 99 percent battery health good?
Yes; a 99% reading is normal and expected shortly after purchase or initial use
A natural dip from 100% to 99% is common in the first few weeks of ownership. Apple expects battery health to drop about 1–2% per month at first; anything steeper could signal trouble, especially if it’s paired with unexpected shutdowns or rapid drain Apple Support.
Why is my battery health draining so fast?
Fast battery wear is usually caused by frequent full charge cycles, high temperatures, or power-heavy apps and settings
Charging from 0% to 100% multiple times daily, using fast chargers, or exposing your phone to temperatures over 35°C (95°F) wears the battery down fast. Background apps, high screen brightness, and always-on location services don’t help either. Apple suggests enabling Low Power Mode and shortening auto-lock time to stretch your battery life Apple Support.
How do you know if your phone battery is damaged?
Signs of battery damage include rapid drain, inability to hold charge, overheating, and unexpected shutdowns
Battery drops 15%+ in under an hour even during light use.
Phone shuts off below 20% or refuses to turn on when plugged in.
Device becomes uncomfortably hot during regular use or charging.
Frequent reboots occur or the Settings app shows a “Service” battery warning.
Should I charge my phone now?
Charge your phone if it’s below 20%, but avoid leaving it plugged in at 100% for long periods
Lithium-ion batteries hate sitting at 100% for hours, and running them below 20% often causes permanent capacity loss. The sweet spot? Top up between 20% and 80%, and use a standard charger instead of fast charging daily. If you’re about to travel or won’t have power for a while, plugging in is fine—just unplug once it hits a comfortable level Consumer Reports.
How long do cell phone batteries last?
Modern smartphone batteries typically last 2 to 3 years or 300 to 500 full charge cycles before noticeable capacity loss
Lithium-ion batteries degrade slowly, so the first signs of wear often appear after roughly 300–500 full 0%–100% cycles. With average daily use, that’s about 2–3 years of regular charging before you notice a drop in screen-on time. Heat, fast charging, and deep discharges speed this up, while gentle use can stretch it closer to 4 years Battery Council International.
What is the use of * * 4636 * *?
The code *#*#4636#*#* opens a hidden Android testing menu, showing battery info, usage stats, and network details
Dial that code in the phone app, and you’ll get a diagnostic screen with tabs for battery, phone, usage, and Wi-Fi information. It can show battery stats like voltage and temperature, but don’t count on it—availability and usefulness vary wildly across manufacturers and Android versions. Apple devices? Nope, this code doesn’t work. For iPhones, stick with Settings > Battery instead Android Help.
What happens if iPhone battery health is below 80?
Apple may slow performance to prevent unexpected shutdowns, and service options like a battery replacement become eligible
Once battery health dips below 80%, Apple considers the battery significantly degraded. At that point, your iPhone might introduce performance management to reduce strain—expect slower app launches or animations. You’ll also see a notification suggesting a battery replacement; Apple offers discounted replacements for eligible models under warranty or via paid service Apple Support.
Is 70 percent battery health good for iPhone?
No; 70% battery health is considered poor and likely causes noticeable slowdowns and reduced usage time
At 70%, your battery holds only 70% of its original capacity, which often leads to shorter battery life and potential performance throttling by Apple. Most users notice the impact after several months of regular charging. Rapid drain or unexpected shutdowns? That’s a clear sign it’s time for a replacement Apple Support.
How do I reset my iPhone battery?
You can’t actually reset the battery itself, but you can reset system settings or force a full discharge/charge cycle to recalibrate the battery meter
Force a full discharge: Use your phone until it shuts off, then let it sit powered off for 30 minutes.
Charge it fully to 100% without interruptions using the original charger.
Reset all settings via Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings to clear inaccurate battery stats.
As a last resort, perform a full system restore using a computer and iTunes or Finder.
These steps won’t restore lost capacity, but they can fix a miscalibrated battery percentage display Apple Support.
How long until battery health goes down?
Battery health typically starts to decline noticeably after 200–300 full charge cycles, with measurable drops every 6–12 months under normal use
Most lithium-ion batteries lose about 1–2% of their original capacity per year with typical usage patterns—around 300–500 full cycles. Heat, fast charging, and deep discharges (0%–100%) can push this timeline forward, while gentle use (20%–80% charging) can slow it down. After 3–4 years, many users see health readings drop below 80% Battery Council International.
Edited and fact-checked by the TechFactsHub editorial team.
Maya Patel is a software specialist and former UX designer who believes technology should just work. She's been writing step-by-step guides since the iPhone 4, and she still gets genuinely excited when she finds a keyboard shortcut that saves three seconds.
