OnePlus 5T Battery Replacement: Cost & DIY Guide
A OnePlus 5T battery replacement costs about $50–$75 at an independent repair shop, or roughly $15–$30 if you buy a replacement cell and do the swap yourself. OnePlus long ago retired battery service for a phone this old, so the practical routes today are a capable local tech or a patient DIY afternoon. It is a doable home repair, and it is by far the cheapest way to bring a phone that launched in late 2017 back to a full day of use.
The 5T is the oldest phone in OnePlus's still-loved lineup — the model that brought the company its first full-screen 18:9 display and a metal unibody. That aluminum body actually makes it a slightly different repair from the glass-backed phones that followed. But the story is the same: after seven-plus years and many hundreds of charge cycles, the 3300mAh battery is almost always the single tired part on an otherwise capable device. Here is how to check it, what a fresh cell costs, and how to install one.
How to check your OnePlus 5T battery health
OxygenOS does not give you a "maximum capacity" percentage like an iPhone, which throws a lot of owners off. Open Settings > Battery and you will see usage graphs, per-app drain, and screen-on time — helpful for spotting what is draining the phone, but not a real health score.
To get an honest read on how far this aging cell has degraded, install AccuBattery from the Play Store. It measures the actual charge going into the battery over several full cycles and estimates real capacity against the original 3300mAh rating. It is an estimate, not a lab test — no app can read a lithium cell's exact state without a controlled discharge — but after about a week of normal charging it gives a realistic picture of how much your OnePlus 5T battery life has faded. On a phone this old, it is common to see the equivalent of 65–75% of original capacity, which is exactly why the runtime feels like a fraction of what it once was.
Signs your OnePlus 5T battery is failing
On a device this age, wear is usually well advanced. Watch for a cluster of these:
- OnePlus 5T battery draining fast — a full charge that once lasted a day now runs out by early afternoon with light use.
- Sudden shutdowns at 20–40%, especially in the cold or under load — a classic sign of an old, high-resistance cell.
- The phone runs warm during ordinary tasks like navigation or a video call.
- Dash Charge feels slow or the percentage stalls before it climbs.
- A OnePlus 5T battery not charging past a point, or refusing to charge, which usually points to a worn-out cell or a tired USB-C port.
Safety note on swelling: a swollen battery is more likely on a phone this old. If the display starts lifting off the frame, the phone rocks on a flat table, or you feel a bulge, stop using it immediately. A swollen lithium-ion battery is under pressure and can rupture or ignite. Do not puncture it, do not keep charging it, and do not leave it in a hot car. Replace a swollen cell promptly and recycle the old one at a certified e-waste drop-off.
OnePlus 5T battery replacement cost
Here is what each route runs in 2026. Your OnePlus 5T battery replacement cost comes down almost entirely to who does the labor.
| Option | Typical 2026 price | What you get |
|---|---|---|
| OnePlus official service | Discontinued | OnePlus no longer services the 5T battery |
| Local repair shop | $50–$75 | Same-day labor, quality varies by shop; ask whether the cell is new |
| DIY with a replacement battery | $15–$30 (part) | The battery, adhesive, and about an hour of your time |
The gap is stark: doing it yourself costs a fraction of shop labor because you only pay for the part. If you keep more than one older Android phone alive at home or in a small business, buying cells from a wholesale replacement battery supplier drops the per-unit cost even further.
The exact replacement battery you need
The OnePlus 5T uses a 3300mAh lithium-polymer battery, sold under the internal part code BLP637. There is really only one variant to worry about — the phone shipped as model A5010 worldwide, and every unit takes the same 3300mAh cell. You can confirm yours under Settings > About phone.
A genuine OnePlus 5T OEM battery is not sold to the public as a standalone part, so a quality aftermarket cell at the full 3300mAh spec is the realistic option for a DIY swap. Look for a fresh, low-cycle cell rather than a shelf-worn pull — an important point on a design this old, since a battery that has itself sat on a shelf for years will not restore full runtime. Make sure the listing specifies the 5T (BLP637), which shares neither the connector nor the shape of the newer OnePlus 6 or 6T. You can browse current stock in our replacement battery collection.
Replacing it yourself: step overview and difficulty
If you are wondering how to replace a OnePlus 5T battery, note that its metal unibody makes it a front-opening repair — you come in through the display, not a back panel like the later glass models. Here is the overview:
- Power off the phone, remove the two bottom screws, then gently heat the screen edges to soften the display adhesive.
- Use a suction cup and thin picks to lift the display from the frame — go slowly and mind the flex cables along the edge.
- Remove the shield plate covering the connectors, then disconnect the battery first, before anything else.
- Release the battery adhesive with heat, isopropyl alcohol, and a plastic pry card; never lever the cell with a metal tool.
- Seat the new 3300mAh cell, reconnect everything, and test before you re-adhere the display.
Honest difficulty rating: 6.5 out of 10. Because the 5T opens from the front, you are separating the screen and working around its delicate flex cables, which raises the stakes slightly over a back-panel phone. The battery adhesive is the other test of patience. Budget an hour, work on a clean, well-lit surface, and keep fresh display adhesive on hand so you can reseal it properly.
After the swap: calibration, not lockouts
Good news for the DIY crowd: the OnePlus 5T predates Apple-style parts pairing, so you will not see a "genuine part" warning or a locked-out battery screen after fitting an aftermarket cell. The phone just boots and runs.
It will, however, want a quick recalibration — and this matters more on an old device whose battery gauge may be badly out of step. Let the new cell drain to about 5–10%, then charge it uninterrupted to a full 100% and leave it a few extra minutes. Do that once or twice and the percentage readout will settle and report accurately again. If you use AccuBattery, reset its learning so it recalibrates against the new cell. From there, expect your OnePlus 5T battery life to feel the way it did when the phone was new.
Repair vs. upgrade: the greener, cheaper call
A comparable new phone costs several hundred dollars at least. A replacement battery costs about the price of a lunch. When the only real problem with your OnePlus 5T is that it no longer lasts the day, replacing the cell is the obvious call for your wallet — and for the planet.
The 5T still runs everyday apps on its Snapdragon 835, still takes a decent photo, and still charges fast over Dash Charge. Every phone kept in service is one less device in a landfill and a few less kilograms of mined lithium and cobalt. A sub-$30 battery restores the one thing that seven-plus years of charging took away. That is the whole idea behind repair over replacement: keep good hardware alive instead of scrapping it. For a walkthrough across every model, see our phone battery replacement by model guide.
FAQ
How much does a OnePlus 5T battery replacement cost?
Expect $50–$75 at an independent repair shop, or $15–$30 for the battery alone if you do it yourself. OnePlus no longer services the 5T battery, so DIY is by far the cheapest route because you only pay for the part.
How do I replace my OnePlus 5T battery?
Because the 5T is a metal unibody, you open it from the front: remove the two bottom screws, heat and lift the display, remove the shield plate, disconnect the battery, release the adhesive, seat the new 3300mAh cell, and reassemble. It takes about an hour and rates a 6.5 out of 10 for difficulty.
Why is my OnePlus 5T battery draining fast?
After seven-plus years and hundreds of charge cycles, the cell's real capacity has dropped well below the original 3300mAh, so it holds far less charge than when new. Install AccuBattery to estimate the wear; on a phone this old it often reads 65–75% or lower, and a replacement will restore your original runtime.
My OnePlus 5T battery is not charging — do I need a new battery?
Often, yes. A cell that will not charge past a certain point or refuses to charge is a common failure symptom on an aging phone. First rule out a dirty or worn USB-C port and a bad cable; if those check out, a replacement battery usually fixes it.
Do I need a genuine OnePlus 5T OEM battery?
OnePlus does not sell its genuine cell as a standalone part, so a high-quality aftermarket battery at the full 3300mAh spec (BLP637) is the practical choice. Choose a fresh, low-cycle cell for your A5010 model rather than a used pull that may already be worn.
Will I see a warning after replacing the battery myself?
No. The OnePlus 5T predates parts pairing, so there is no genuine-part warning after an aftermarket swap. Just recalibrate by running the new cell low once and charging it fully.