iPhone 11 Battery Replacement: Cost & DIY Guide

iPhone 11 battery replacement: what it costs and how to do it

An iPhone 11 battery replacement runs about $89 through Apple, $50 to $90 at a local repair shop, or roughly $25 to $40 if you do it yourself with a quality 3110 mAh replacement cell. The phone launched in September 2019, which means a lot of these devices are now on their original battery well past 800 charge cycles. That is exactly when capacity falls off a cliff and the phone starts acting like it is ready for the recycling bin.

It usually is not. The iPhone 11 (models A2111, A2221, and A2223) still holds a fast A13 Bionic chip and runs current iOS just fine. In most cases the only tired part is the battery, and that is a $25 to $40 fix that keeps a capable phone out of a landfill.

How to check your iPhone 11 battery health

Before you buy anything, look at the numbers your phone already keeps. Go to Settings > Battery > Battery Health & Charging. The key figure is Maximum Capacity, shown as a percentage of the original 3110 mAh design capacity.

• 90% or above: healthy. No action needed.
• 80% to 89%: aging. You will notice shorter days but the phone is fine.
• Below 80%: Apple considers the battery consumed. iOS may show a "Service" message. This is replacement territory.
• Peak Performance Capability message: if you see "your battery's health has significantly degraded," the phone has already throttled its own speed to avoid shutdowns.

An original iPhone 11 battery is rated to hold 80% of capacity through roughly 500 full charge cycles. Most owners blow past that in two to three years, so a phone from the 2019 to 2021 window is a prime candidate for a fresh cell.

Signs your iPhone 11 battery is failing

• The phone dies at 20% or 30%, or shuts off completely in cold weather.
• It feels slow or stutters, especially opening apps or the camera, because iOS is throttling to protect the battery.
• Screen-on time has collapsed. You used to get a full day and now you are hunting for a charger by lunch.
• The back glass gets warm during normal use or charging.
• The battery percentage jumps around, dropping several points at once or freezing on a number.
• In a worst case, the screen or back glass starts to lift. A swollen battery is a stop-now situation. Do not keep using or charging the phone.

iPhone 11 battery replacement cost compared

Here is what you can expect to pay in 2026 across the three realistic routes. Prices assume an out-of-warranty phone, which almost every iPhone 11 now is.

Option	Typical cost	Turnaround	What you get
Apple (out of warranty)	~$89	Same day to 1 week (mail-in)	Genuine Apple battery, no "Unknown Part" notice, warranty on the repair
Local repair shop	$50 to $90	30 to 60 minutes	Aftermarket or OEM-pull battery, labor included, shop warranty varies
DIY replacement	$25 to $40	45 to 90 minutes	Quality 3110 mAh cell plus your own labor; lowest cost, most control

Apple charges a premium for the genuine part and the guarantee. A shop saves you a little and does the work. DIY is the cheapest by a wide margin, and if you already own a basic toolkit the only recurring cost is the battery itself.

The exact replacement battery for the iPhone 11

The iPhone 11 uses a 3110 mAh lithium-polymer battery at 3.83V. That capacity is fixed by the phone's design, so any correct replacement should match it, not undercut it. Be wary of listings that quietly advertise 2900 mAh or an unlisted capacity, because a smaller cell means shorter runtime and a shorter service life.

Our ZeroCycle 3110 mAh battery for the iPhone 11 is a zero-cycle cell, meaning it ships fresh rather than as a used pull, and it fits every iPhone 11 variant: A2111, A2221, and A2223. It is the same physical cell whether your phone was sold in the US, Europe, or China, so you do not need to decode your model number to order the right part. If you want to browse the full range, the replacement batteries collection covers other iPhone, Samsung, Pixel, and OnePlus models too.

How to replace an iPhone 11 battery yourself

The iPhone 11 is a moderate DIY job. It is not the hardest iPhone to open, but it is not a beginner's first repair either. Budget 45 to 90 minutes the first time and work somewhere clean and well lit. Here is the overview.

What you need

• A P2 pentalobe driver, a Y000 tripoint driver, and a Phillips #000 driver
• A suction cup or opening tool and a thin plastic pry pick
• A pack of pre-cut battery adhesive strips
• A plastic spudger and a pair of tweezers
• Optional but smart: a heat pad or hair dryer to soften the old adhesive

The steps

• Power down and remove the two pentalobe screws beside the charging port.
• Apply gentle heat along the bottom edge, then use a suction cup to create a gap and slide a pick around the perimeter to release the display adhesive. Open the screen from the bottom like a book, hinging at the top. Go slowly, the display cables run along the right side.
• Disconnect the battery first. Remove the metal bracket over the connectors and unplug the battery before touching anything else. This is the single most important safety step.
• Pull the battery adhesive tabs. Two black tabs sit at the bottom of the battery. Pull each one slowly and steadily at a low angle so the strip stretches out from under the cell. Rushing this is how strips snap.
• Lift out the old battery, lay in the new 3110 mAh cell with fresh adhesive, and reconnect. Test that the phone powers on and reads the new battery before you seal the display.
• Reseat the display, replace the brackets and screws, and press the screen edges firmly to set the adhesive.

Honest difficulty check

The trickiest parts are prying the glued display without cracking it and removing the adhesive strips without them tearing off under the battery. If a strip snaps, a little heat and a plastic card usually free the cell, but never pry a lithium battery with a metal tool and never puncture it. If any of that makes you nervous, a local shop doing the same swap for $50 to $90 is money well spent.

The "Unknown Part" message after a non-Apple battery swap

After you install any battery that is not paired by Apple, iOS will show a notice: "Unknown Part. Unable to verify this iPhone has a genuine Apple battery." On the iPhone 11 you will also lose the Battery Health percentage readout, which gets replaced with a similar warning.

This is expected and it does not mean the battery is bad. Apple ties the battery health reporting to a control chip that only its own service tools can re-pair, so any third-party or even genuine-but-unpaired battery triggers the message. The phone charges, holds power, and works completely normally. What you lose is the on-screen percentage, not any real function. If tracking exact battery health matters to you, a shop with Apple's authorized tooling can pair the cell, otherwise the message is a cosmetic footnote you can safely dismiss.

Repair or upgrade? The greener call

It is tempting to treat a dying battery as a reason to buy a new phone. Do the math first. A new mid-range or flagship iPhone costs several hundred to over a thousand dollars. A 3110 mAh battery is $25 to $40. Unless your iPhone 11 has other serious problems, replacing the battery restores nearly all of the day-one experience for a tiny fraction of the price.

There is a bigger cost that never shows up on the receipt. Manufacturing a single new smartphone generates an estimated 130 to 165 pounds of carbon emissions, most of it from mining and refining the materials before the phone is ever switched on. Every iPhone 11 kept alive another two or three years is one less device manufactured and one less unit of e-waste, now the fastest-growing waste stream on the planet. Repairing beats replacing on cost, carbon, and landfill volume. That is the entire idea behind keeping devices alive: fix the one worn part instead of discarding the whole machine.

Ready to start? Grab the exact cell from our phone battery replacement by model guide, or go straight to the iPhone 11 3110 mAh battery.

FAQ

How much does an iPhone 11 battery replacement cost?

Apple charges about $89 for an out-of-warranty iPhone 11 battery. A local shop typically runs $50 to $90 including labor. Doing it yourself with a quality 3110 mAh battery costs about $25 to $40, making DIY the cheapest option by a wide margin.

What is the battery capacity of the iPhone 11?

The iPhone 11 uses a 3110 mAh lithium-polymer battery rated at 3.83V. A correct replacement should match that 3110 mAh figure. Cells advertised at lower capacities will give you shorter runtime and a shorter service life.

Will I lose Battery Health after a non-Apple battery replacement?

Yes. iOS shows an "Unknown Part" notice and hides the Battery Health percentage for any battery Apple has not paired, including some genuine cells. The phone still charges and works normally. Only the on-screen health readout is affected, not battery function.

Is replacing the iPhone 11 battery yourself hard?

It is a moderate repair, not a beginner's first job. The main challenges are prying the glued display without cracking it and pulling the adhesive strips without snapping them. Budget 45 to 90 minutes, always disconnect the battery first, and never puncture a lithium cell.

How do I know if my iPhone 11 needs a new battery?

Check Settings > Battery > Battery Health & Charging. If Maximum Capacity is below 80%, or you see unexpected shutdowns, throttled performance, or rapid battery drain, the cell is worn and a replacement will restore normal runtime.

Which iPhone 11 model numbers does the replacement battery fit?

The same 3110 mAh cell fits all iPhone 11 variants: A2111, A2221, and A2223. These are regional versions of the same phone, so you do not need to match your specific model number when ordering the battery.