iPhone 7 Plus Battery Replacement: Cost & Guide
An iPhone 7 Plus battery replacement runs about $15 to $35 in DIY parts, $50 to $85 at a repair shop, or $89 through Apple. It is very much a DIY-doable job: the 7 Plus opens from the front and a careful first-timer can complete the swap in 30 to 45 minutes with an inexpensive toolkit.
Released in 2016, the iPhone 7 Plus was Apple's first dual-camera phone and remains a capable large-screen device nearly a decade later. Its 2,900 mAh battery was one of the biggest Apple had shipped at the time, but a decade of charge cycles takes its toll, and a tired cell is usually the only thing standing between this phone and another year or two of daily use.
How to check your iPhone 7 Plus battery health
Confirm the battery is the culprit before ordering parts. Open Settings > Battery > Battery Health & Charging. Apple added this screen in iOS 11.3, and the 7 Plus supports it.
Maximum Capacity tells you how much charge the cell still holds relative to new; below 80% is officially "consumed," and phones this age frequently sit in the 60s or low 70s. The Peak Performance Capability line will note if iOS has started throttling the processor after an unexpected shutdown. On the larger 7 Plus, that throttling is felt most when the phone tries to power both cameras or a demanding app, so a fresh battery restores both runtime and responsiveness.
Signs your iPhone 7 Plus battery is failing
If you are searching because your iPhone 7 Plus battery is draining fast, look for these companion symptoms:
- Sudden shutdowns while the phone still shows 20% to 40% charge, especially in cold weather.
- Noticeable lag or stutter that points to iOS performance throttling.
- An iPhone 7 Plus battery not charging reliably, or charging in slow fits and starts.
- The phone getting warm during ordinary tasks like browsing or navigation.
- Maximum Capacity reported below 80%.
Swelling safety note: the 7 Plus is a sealed, water-resistant design, so a swelling battery has nowhere to expand except against the screen. If you see the display lifting at the edges or a bulge in the chassis, stop charging and stop using the phone. A swollen lithium-ion cell can rupture or ignite. Never puncture or compress it, and recycle the old battery at an e-waste facility rather than throwing it away.
iPhone 7 Plus battery replacement cost
Here is the 2026 pricing picture across your three main options:
| Option | 2026 price | What you get |
|---|---|---|
| Apple (out of warranty) | ~$89 | Genuine cell, in-store or by mail |
| Local repair shop | $50 - $85 | Labor included, often same day |
| DIY replacement | $15 - $35 | Battery, adhesive, and tools; your labor |
The iPhone 7 Plus battery replacement cost difference is hard to ignore: DIY is routinely a fraction of what Apple charges. Ordering cells at wholesale volume lowers the per-unit price further, which is exactly how repair shops keep their margins. You can browse current options in our replacement battery collection.
The exact replacement battery you need
The iPhone 7 Plus takes a 2,900 mAh lithium-ion battery. This is specific to the Plus and is physically larger than the 1,960 mAh cell in the standard iPhone 7, so the two are not interchangeable. The 7 Plus ships under model numbers A1661, A1784, A1785, and A1786 depending on region and carrier, which you can verify under Settings > General > About.
When buying an iPhone 7 Plus OEM battery or a premium aftermarket equivalent, insist on a zero-cycle cell rated at the full 2,900 mAh. Under-spec cells are the most common reason a fresh battery disappoints within a month. Because the 7 Plus uses a strong water-resistant seal, plan to install a new set of iPhone 7 Plus battery adhesive strips so the cell is held securely and the frame reseals cleanly.
A software advantage worth knowing
The iPhone 7 Plus predates Apple's battery serialization, which did not arrive until the iPhone XS and XR generation. In practice, a quality third-party battery will not trip the "Unable to verify this iPhone has a genuine Apple battery" lockout, and Battery Health will keep reporting a percentage. That makes the 7 Plus one of the more forgiving iPhones to service at home.
How to replace an iPhone 7 Plus battery yourself
Here is the overview of how to replace an iPhone 7 Plus battery. You will want a P2 pentalobe driver, a tripoint Y000 and Phillips driver, a suction cup, plastic picks, tweezers, and a set of adhesive pull-tabs.
- Power down and remove the two pentalobe screws at the bottom of the phone.
- Lift the display with a suction cup and pick. The 7 Plus screen hinges on the right; open it gently and support it so the flex cables at the top are not strained.
- Disconnect the battery connector first, after removing its metal bracket, before unplugging anything else. This eliminates the risk of a short.
- Do not disturb the Home button flex. The 7 Plus uses a solid-state Taptic Home button tied to Touch ID, and its original flex must stay with the phone. For a battery swap you do not need to remove it, so leave it alone.
- Pull the battery adhesive strips slowly and straight out from the base of the cell. If a strip breaks, apply mild heat and lift with a plastic card, never a metal tool.
- Seat the new 2,900 mAh cell, apply fresh adhesive, reconnect, and reassemble in reverse.
Honest difficulty rating: 3 out of 5. The larger 7 Plus body actually gives you a bit more room to work than the smaller 7. The main things to respect are the water-resistant seal and the delicate adhesive pull-tabs; go slowly on both and this is a comfortable weekend repair.
After the swap
Run one full calibration cycle after reassembly: charge to 100%, use the phone down to a normal daily low, then charge back up. This lets the battery gauge settle on accurate readings. Because the 7 Plus has no battery authentication lock, Battery Health should display your new capacity without a warning; if it briefly shows "Service," a charge cycle typically clears it. If your reseal is tidy, the phone retains its original splash resistance, though a repaired device is best kept away from deliberate water exposure.
Repair vs. upgrade: the green math
A battery under $35 gives an iPhone 7 Plus a fresh lease on life, versus hundreds for even a used replacement handset. The bigger point is environmental: the overwhelming majority of a smartphone's lifetime carbon footprint comes from manufacturing, not from the years you actually use it. Replacing one small cell keeps a capable dual-camera phone in service and keeps its embedded materials and emissions out of the waste stream. For a device that still runs everyday apps, messaging, and calls without complaint, a battery swap is simply the smarter, greener choice.
To get going, pick up your parts from our battery collection, and if you are servicing more than one device, our battery replacement by model guide walks through dozens of iPhone, Galaxy, and Pixel models.
FAQ
How much does an iPhone 7 Plus battery replacement cost?
In 2026, budget about $15 to $35 for DIY parts, $50 to $85 at an independent repair shop, or roughly $89 through Apple. DIY is the least expensive path by a wide margin.
How do I replace an iPhone 7 Plus battery myself?
Power off, remove the two bottom pentalobe screws, lift the screen from the right hinge, disconnect the battery connector first, leave the Taptic Home button flex in place, release the adhesive strips, seat the new 2,900 mAh cell with fresh adhesive, and reassemble. Plan on 30 to 45 minutes.
Why is my iPhone 7 Plus battery draining fast?
A cell that is years old loses capacity and may cause iOS to throttle the processor after shutdowns. Check Settings > Battery > Battery Health; a Maximum Capacity under 80% is the usual reason, and a new battery resolves it.
My iPhone 7 Plus battery is not charging. What should I check?
Start with the basics: clean the Lightning port and try a known-good cable and adapter. If it still charges slowly or intermittently, an aged battery is the likely cause and replacing it restores normal charging.
What size battery does the iPhone 7 Plus use?
The iPhone 7 Plus uses a 2,900 mAh lithium-ion battery, which is larger than the 1,960 mAh cell in the standard iPhone 7. The two are not interchangeable, so confirm you have a Plus (model A1661, A1784, A1785, or A1786).
Do I need new adhesive strips when replacing the battery?
Yes. The iPhone 7 Plus is water resistant, so you should install fresh battery adhesive strips to hold the new cell securely and help the frame reseal properly.