Most listings pair the BLP757 battery model name with the Realme 6. It is sold as a Li-ion polymer pack of 4300 mAh typical, with a rated figure near 4210 mAh at 3.87 V. Realme sits inside the Oppo group, so the Realme 6 cell wears a BLP code just like Oppo handsets do.
People also type it as "blp 757 battery model name", with a space. The code is on the sticker of the cell, which you can see only when the back is open. The Realme 6 back is sealed, so leave that step to a technician. A few sellers stretch BLP757 to other Realme 6 series models, but they contradict one another, so the label on your Realme 6 cell decides.
Quick facts
Step by step
Write down the exact phone name
Open Settings, tap About phone and note the device name. If the page is hard to find, type about in the Settings search bar. Realme 6, 6 Pro, 6i and 6s are different phones and may not share a battery.
Note the model number
On the same screen or on the retail box, copy the model number. It helps the technician pick the right pack if two versions of a phone were sold.
Have the old sticker read
After the back is opened,
BLP757should appear on the cell with its voltage and capacity. Ask for a clear photo of it before the pack is removed.Put old and new packs side by side
The new pack must show the same code, a capacity close to the old figure and the same connector and size. If any of these differ, stop and ask why.
Test the print and the weight
Sharp print, batch details and a weight close to the old pack are good signs. A very light pack with a bigger mAh claim is not.
Phones that use the BLP757 battery model name
Oppo, Realme and OnePlus all print BLP at the start of their cell codes. They do not name a phone. For BLP757, most listings agree on the Realme 6. Other Realme 6 series phones appear under this code in some listings only, so treat them as a check, not a match.
| Phone | Status | Note |
|---|---|---|
| Realme 6 | Matched by most listings | 4300 mAh typical |
| Realme 6 Pro | Listings disagree | Check the sticker before ordering |
| Realme 6i | Listings disagree | Check the sticker before ordering |
| Realme 6s | Listings disagree | Check the sticker before ordering |
| Realme 5 | Different code | Not a BLP757 phone |
The phones share a name but not a body, so a shared battery is a claim to verify on the sticker, not a promise. Every other BLP code sits in our Oppo and Realme code table.
4300 mAh or 4210 mAh: which figure belongs to your pack
Two numbers circulate for this pack. BLP757's 4300 mAh is the typical figure quoted on Realme 6 spec sheets. The 4210 mAh figure shows up in battery listings and matches the rated, or minimum, value that makers print on the cell. Both can be true for the same pack. Your own sticker may show either one or both, so read it instead of trusting a list.
To get watt hours for BLP757, take 4300 mAh times its voltage and divide by a thousand. At 3.87 V, the rated 4210 mAh gives about 16.3 Wh, and the typical 4300 mAh gives about 16.6 Wh. The gap is small, so do not pay extra for a pack that only differs by this much.
Run time is another matter. The screen, signal, brightness and the apps you open decide a day of use more than a few mAh do. A Realme 6 with BLP757 at 4300 mAh lasts most owners a working day, less with games or a hotspot running.
Confirming BLP757 before you order
The name Realme 6 alone is not enough to order with. A buyer asking for a Realme 6 pack should first see the code on the old cell. Once the back is open, the sticker lists the code, the voltage and the capacity, and sometimes a batch line.
- Note the Realme 6 model number shown under About phone.
- Match the code on the old cell with the code on the new pack, letter for letter.
- Match capacity within a small gap, never far above the old one.
- Match the shape and connector end by looking at both packs together.
Photograph the old sticker with the phone's name on the screen in the same frame. The photo works as a record if the shop later gives you a different pack.
If your sticker shows something other than BLP757, go with your sticker. Packs for other phones can look almost the same in size.
Realme 6 owners: an example of a wrong pack
The Realme 6 series is easy to mix up because the names are so close. Phones of similar size often carry packs with nearly the same number.
A Realme 6 owner brought a phone that died at 25 percent and asked for the Realme 5 battery because both phones felt the same in the hand. Once the back was off, the technician saw BLP757 on the old Realme 6 cell and declined to fit the wrong part. The Realme 5 pack has a different code and was not meant for that phone. The correct pack was fitted the same day.
Remember that a sealed phone gives no clue from outside. The name of the phone, the model number and the sticker together settle the question.
Codes that look like BLP757
BLP codes differ only in the last three digits, and faded print makes 7, 1 and 3 hard to separate. These pages cover nearby codes, each with its own phones:
- BLP731 is a separate pack, so look up its phone list before treating it as a substitute.
- BLP727 and BLP741 sit close in number but are not interchangeable with BLP757 by that fact.
- The Realme 7 battery page covers a phone that people often confuse with the Realme 6 range.
A 4300 mAh Realme pack under a different code may differ in outline or plug. Choose the exact code and avoid trial fitting.
Signs your pack is wearing out
| Realme 6 symptom | Likely cause | Realme 6 next step |
|---|---|---|
| Realme 6 percentage jumps down | Aged cell with lower real capacity | Check the Realme 6 health, then save for a BLP757 |
| Phone switches off with 20 to 30 percent shown | Weak cell under load | Reboot, charge fully, then ask a technician to test |
| Back panel lifts or screen edge gaps | Swollen cell | Unplug the Realme 6 and see a technician today |
| Phone is warm when idle | Heavy app, bad cable or faulty pack | Remove the cover, change the cable, then get it checked |
Many cases of fast drain come from apps and weak signal. Begin with our list of drain causes, then run a quick health test on the Realme 6.
A BLP757 that puffs up, runs hot, leaks or is dented can start a fire. Disconnect the Realme 6 straight away, keep pressure off it and move it away from anything warm. Get it to Realme service within the day. Realme 6 BLP757 fakes often claim far past 4300 mAh, so buy BLP757 and nothing else.
Fitting a new BLP757 pack safely
The Realme 6 has a sealed back, so the opening needs the right tools and some practice. Realme service or a workshop you have used before should do the fitting. Tell them Realme 6 plus the model number and have them hold BLP757 against the old label.
Be suspicious of a new BLP757 that shows any of these:
- It is noticeably lighter than the Realme 6's original cell.
- Its BLP757 print smears and shows no batch number.
- The capacity shown is much more than 4300 mAh. A Realme 6 sized pack simply cannot store that much.
Our battery swap guide covers fitting in more depth. Once the BLP757 is fitted, charge the Realme 6 to full and keep an eye on its temperature for a few days.
Everyday care for a Realme 6 battery
This phone is no longer new, so the pack may already have seen many charge cycles. Heat does the most harm. Rest the Realme 6 on a desk when charging it, never on a quilt or in a sunny spot, and slip off a chunky cover if it warms.
The Realme 6 came with a 30 W Dart charger, and that adapter or a lower rated one is the right choice. Swap out any lead whose connector warms in use. Sitting at full charge for hours wears a BLP757 too, so unplug the Realme 6 when it suits you. If a restart and full charge do not stop the Realme 6 dying early, get the BLP757 tested.
Frequently asked questions
Which phone has the BLP757 battery model name?
Most listings match BLP757 to the Realme 6. Some listings add other Realme 6 series phones, but they disagree. The BLP757 print on the outgoing cell is the final check.
What capacity is BLP757?
It is sold as 4300 mAh typical. Listings also show about 4210 mAh as the rated value at 3.87 V, so your sticker may carry the lower number.
Is BLP757 the Realme 6 battery model?
Yes, according to most listings. For the Realme 6 Pro, 6i and 6s, check your own sticker, as listings disagree.
Can I use a BLP731 battery instead of BLP757?
Never assume that. Those codes are different packs, and size or plug may differ. Fit only the code that is on your old sticker.
What is the BLP 757 battery model name with a space?
It is the same code, written with a space by many buyers. The proper form has no space: BLP757.
How can I tell a fake BLP757 battery?
Warning signs are low weight, smudged print, no batch line and a claim well beyond 4300 mAh. Hold it beside the Realme 6's original cell before fitting.