iPhone Battery Health: Is 80%, 85% or 90% Good or Bad? (2026 Guide)

You open Settings > Battery > Battery Health, see 87% (or 84%, or 79%), and wonder the same thing almost every customer asks us at the counter: is this battery health good or bad?

Short answer: on an iPhone that's more than a year old, 85% battery health or above is good. 80–84% is okay, but you'll feel it by evening. Below 80%, it's time for a new battery.

The number alone doesn't tell the whole story, though. A two-year-old iPhone at 85% is perfectly normal. A six-month-old iPhone at 85% is not. Below, we break down every range, when to replace the battery, what it costs in India in 2026, and what to look for if you're buying a second-hand iPhone.

iPhone battery health percentage: what each range means

Battery health	What it means day to day	Roughly typical for	What to do
95–100%	Like new. A full day for most people.	Under a year old, or a fresh battery	Nothing. Just keep it away from heat.
90–94%	Very good. You won't notice any difference.	About a year of normal use	Nothing.
85–89%	Good. Slightly shorter day, still dependable.	1.5 to 2.5 years of use	Normal wear. Keep an eye on it.
80–84%	Fair. Heavy users will need a top-up by evening.	2 to 3 years, or heavy use	Usable. Plan a replacement within the year.
Below 80%	Worn. Shorter backup, possible slowdowns or sudden shutdowns.	3+ years, or a phone that's lived in heat	Replace the battery.

Treat the age column as a rough guide. How you charge, how much you game and how hot your phone gets matter far more than the calendar.

What does iPhone battery health actually measure?

The percentage Apple calls Maximum Capacity compares your battery today with when it was new. At 85%, the battery holds about 85% of the charge it originally could. If your iPhone lasted 10 hours on a full charge when it was new, expect roughly 8.5 hours now with the same usage.

Every lithium-ion battery wears down with charge cycles. One cycle means using 100% of the battery's capacity, not necessarily in one go. Use 60% today and 40% tomorrow, and that's one cycle.

Apple's own numbers are useful here. According to Apple Support, batteries in iPhone 14 and earlier are designed to keep about 80% of their original capacity at 500 full cycles, and iPhone 15 and later at 1,000 cycles, under ideal conditions. If you charge about once a day, 500 cycles is roughly a year and a half, and 1,000 cycles is close to three years.

How to check battery health on your iPhone

1. Open Settings > Battery > Battery Health (it's called "Battery Health & Charging" on some iOS versions).
2. Look at Maximum Capacity. That's your battery health percentage.
3. Read the Peak Performance Capability line. You want to see "Your battery is currently supporting normal peak performance."
4. On iPhone 15 and newer, you can also see the cycle count, manufacture date and first-use date. Depending on your iOS version, they're under Settings > General > About or inside the Battery Health screen.

Is 85% battery health good?

Yes, for most iPhones. If your phone is 18 months or older, 85% is right where it should be. You'll still get through a normal workday, maybe with a short top-up if you're on maps, calls and Instagram all day.

If your phone is under a year old and already at 85%, something is speeding up the wear. The usual culprits we see are heat (charging under a pillow, on a car dashboard, or while gaming), cheap chargers, and long gaming sessions while plugged in. Fix those habits and the drop will slow down.

Buying used? An iPhone 13 or iPhone 14 at 85–88% is a healthy, honest number for a phone of that age. It's not a reason to walk away.

Is 80% battery health bad? When to replace your iPhone battery

80% isn't "bad". It's the line. Above it, the battery is worn but fine. Below it, Apple considers the battery significantly degraded and iOS will usually show a Service recommendation.

Replace your iPhone battery if you notice any of these:

• Maximum Capacity is below 80%.
• Settings says "Your battery's health is significantly degraded".
• The Peak Performance line says performance management has been applied. That means your iPhone shut down unexpectedly and iOS is now slowing it down to prevent it happening again.
• The phone dies at 15–30%, or the percentage jumps around.
• The screen is lifting at one edge or there's a new gap in the frame. That's usually a swollen battery. Stop charging it and get it checked right away.

iPhone battery replacement cost in India (2026)

Apple publishes out-of-warranty battery service prices by model. The latest figures reported for India:

Model	Apple battery service (out of warranty)
iPhone 18 Pro / 18 Pro Max	₹13,900
iPhone 17 Pro / 17 Pro Max / iPhone Air	₹11,800 at launch (reports suggest Apple has since raised the Pro fee)
iPhone 17	₹9,800
iPhone 16 and older	Lower, varies by model

Apple revises these fees from time to time, so always confirm the exact price for your model on Apple's support site or with an Apple Authorised Service Provider before you go. If you have AppleCare+, the battery is replaced free once it tests below 80%.

What about a cheaper local battery?

Local shops will fit a battery for much less, and some do a decent job. Know the trade-offs first:

• On iPhone XS and newer, a non-Apple battery triggers the message "Unable to verify this iPhone has a genuine Apple battery", and the battery health figure may not be accurate.
• It shows up as an Unknown Part under Parts and Service History, which lowers resale value.
• Quality varies a lot. A poor cell can lose capacity within months.

Our honest take: if you plan to keep the phone for two more years or more, a genuine Apple battery is worth paying for.

Buying a second-hand iPhone? How to read the battery health

Battery health is one of the first things to check on a used iPhone, but read it with a bit of context.

100% on a three-year-old iPhone means the battery has been replaced. That's not a bad thing. Just check where it came from: go to Settings > General > About and look for Parts and Service History. This section only appears if the phone has been repaired. It will say Genuine Apple Part or Unknown Part next to the battery. Then ask the seller what was used.

On iPhone 15 and newer, check the cycle count too. A phone at 90% with 300 cycles has plenty of life left. One at 90% with 900 cycles is closer to the end than it looks.

Then do the maths. Here's a real example from our own iPhone listings on the day we wrote this: an iPhone 14 128GB at 81% battery for ₹34,490, and another iPhone 14 128GB at 100% for ₹36,090. The gap is ₹1,600, far less than any battery replacement. Pay the extra for the healthier battery.

Our rule of thumb: if the price difference between two phones is smaller than the cost of a new battery, buy the one with the better battery health. If the lower-battery phone is several thousand rupees cheaper, it can still be a smart buy. Just set that money aside for a new battery later.

Want the full list of things to check before you pay? Read our 16-point second-hand iPhone checklist. Not sure which model to pick? See which second-hand iPhone to buy in 2026.

7 habits that slow down iPhone battery wear

1. Keep it cool. Apple says iPhones work best between 0°C and 35°C. A parked car in an Ahmedabad May afternoon goes way past that. Don't leave your phone on the dashboard, and avoid navigation in direct sun while it's charging.
2. Turn on Optimised Battery Charging in Settings > Battery > Charging. On iPhone 15 and later, you can also set a charge limit such as 80%.
3. Don't game or binge-watch while fast charging. Heat plus charging is the fastest way to age a battery.
4. Don't run it down to 0% regularly. Topping up whenever it suits you is completely fine.
5. Use a good charger. Use Apple's own or a BIS-certified one from a known brand. Cheap roadside adapters run hot and charge unevenly.
6. Take off thick cases if the phone gets warm while charging.
7. Store it at about 50% if you're keeping it unused for weeks, never at 0%.

3 battery myths we hear every week

"Charging overnight kills the battery." Not on a modern iPhone. Optimised Battery Charging learns your routine, holds the charge at 80% and finishes just before you usually unplug.

"Drain it to 0% once a month to calibrate it." That advice is from the old nickel-battery days. Deep discharges are actually harder on lithium-ion cells.

"Fast charging ruins the battery." iPhones charge fast up to around 50% and then slow down on their own. Heat does the damage, not the charger's wattage.

How we handle battery health at The Digital Hub

We've sold more than 1,00,000 devices over 12 years, so we take batteries seriously:

• Battery health is shown on every iPhone listing. Android listings show the cycle count or a battery condition grade.
• Phones below 80% are clearly badged and priced to match.
• Every device goes through our 120-point inspection, including the battery, before it's listed.
• Every device carries at least a 3-month warranty that covers battery faults from normal use, plus 7-day returns. See our warranty policy.

Browse certified pre-owned iPhones with the battery health listed upfront, or walk into our showrooms in Gandhinagar, South Bopal or Bodakdev and check the battery yourself. Got a question about a specific phone? WhatsApp us on +91 8980 700 700.

Frequently asked questions

Is 87% battery health good for an iPhone?

Yes. 87% is good for any iPhone older than about a year. You'll get close to a full day of normal use, and there's no reason to replace the battery.

Is 90% battery health good for an iPhone 13?

Very good. But the iPhone 13 launched in 2021, so a 90% reading today usually means the battery was replaced at some point. Check Parts and Service History to see whether it's a genuine Apple battery.

How fast does iPhone battery health drop?

There's no fixed rate. It depends on how many cycles you run and how much heat the phone sees. Apple designs batteries to reach about 80% after 500 cycles on iPhone 14 and older, and after 1,000 cycles on iPhone 15 and newer. A light user in an air-conditioned office will lose far less than someone gaming on a hot commute.

Can iPhone battery health go back up?

Not really. It can tick up by a percent after an iOS update recalibrates the reading, but battery wear is chemical and can't be reversed. Only a new battery brings it back to 100%.

Does Apple replace the battery for free below 80%?

Only if you have AppleCare+, or if the battery is faulty while the phone is still under Apple's warranty. Otherwise you pay the out-of-warranty fee for your model.

What battery health should I accept on a used iPhone?

85% or higher is ideal. 80–84% is fine if the price reflects it. Below 80%, only buy if the discount covers a new battery.