The BLP923 battery model name goes with the Realme C51 (RMX3830) in most listings and by one listing to the Realme C51s (RMX3765), as a 5000 mAh pack. Several Oppo sellers also file it under the A57 4G, A57s, A77 5G and A78 5G, and one adds the OnePlus Nord N300, so this one code may span three brands of the same group. Those extra names come from parts sellers rather than Oppo, so check the BLP923 print inside your phone before paying.
People search it as "blp 923 battery model" or "blp923 battery mobile model name", usually because the code is printed on an old pack or a seller has quoted it. The code is visible only on the pack sticker, so a technician has to open the back of a sealed phone first. Realme C53 and C55 sit close to the C51 in name, but each has its own code, so do not carry this match over to them.
Quick facts
Step by step
Find the exact phone name and model number
Open Settings and tap About phone. If the model number is not on the first screen, type model in the Settings search bar. A Realme C51s should show RMX3765.
Compare it with the box or invoice
The model number printed on the box should agree with the phone. A mismatch means you may be holding a different variant, and the battery can differ.
Have the old pack label read
Once the back is open, look for
BLP923on the sticker, near the mAh and volt figures. Ask the technician to show it to you before the pack goes in the bin.Hold the new pack next to the old one
Code, size, connector shape and weight should agree. Do not accept a pack that only matches the capacity number.
Which phone uses the BLP923 battery model name
BLP is the prefix seen on many Oppo, Realme and OnePlus packs, and it points to the wider group rather than one phone. For BLP923, most listings name the Realme C51, and one names the C51s. Several Oppo parts sellers put the same code against four A series models, and one lists the Nord N300. The table marks which links are firm and which are open.
| Phone | Status | What to do |
|---|---|---|
Realme C51 (RMX3830) | Listed by most sellers | See the Realme C51 page and the old sticker |
Realme C51s (RMX3765) | One spare part listing | Confirm on the old cell |
Oppo A57 4G (CPH2387), A57s (CPH2385) | Named by several sellers | Read the label before ordering |
Oppo A77 5G (CPH2339), A78 5G (CPH2483) | Named by several sellers | Read the label before ordering |
| OnePlus Nord N300 | Named by one seller | Treat as unconfirmed |
| Realme C53, Realme C55 | Not matched to BLP923 | Open their own pages |
Open the pages for the Realme C53 and Realme C55 to see what each one uses. If your label does say BLP923 on a phone not listed here, the label in your hand wins over any list.
Rated and typical capacity of BLP923
The 5000 mAh figure comes from the spare part listing, so take it as the typical capacity, the headline value in adverts. Many Oppo group packs print a slightly smaller rated (minimum) number on the sticker. For BLP923 that rated number is unknown to us, so read it from your own label.
Watt hours show the real energy. The formula is mAh times volts, then divided by 1000. Purely as an illustration, a cell of 5000 mAh at 3.9 V gives 19.5 Wh. Your label shows the true volts, and no voltage has been verified for BLP923.
Battery life is not just mAh. Screen size, brightness, mobile signal strength and which apps stay open all change how many hours you get, so two phones with the same 5000 mAh can last differently.
Checking the code before you pay
Do not order from the phone name alone. Some phones are sold in several versions, and a code seen in a listing can be wrong. Use a short routine and keep a photo of each step.
- Note the model number in About phone.
- Photograph the sticker of the old pack once the back is open.
- Check that the letters and digits read exactly
BLP923, with no extra letter after the number. - Compare the connector and the pack size with the new one.
Send the sticker photo to the seller or technician before paying. A clear photo ends most arguments about the code.
The same routine is explained for every brand in the guide on finding a battery model name.
Similar Oppo group codes that get mixed up with BLP923
At a repair counter the mix-up is usually one digit. Packs from the same family look alike: same black sticker, same size, same flat connector. A near code can still belong to another phone, so open the page of the code you actually hold.
- BLP927 differs by one digit at the end.
- BLP907 and BLP903 are easy to misread when the print is faint, because 9 and 3 and 7 blur together.
- BLP915 sits in the same range of numbers but is its own code.
For every code of the group in a single table, go to the Oppo, Realme and OnePlus battery codes page.
A customer brought a Realme with a worn pack and asked for "BLP 923". The seller had BLP927 on the shelf and said it was the same. The technician held it against the old sticker, saw the last digit differ, and refused to fit it until the exact code was in hand.
Signs that a BLP923 pack is wearing out
| Symptom | Reason | Action |
|---|---|---|
| Level falls fast in the first hour | The cell has lost part of its capacity | Test the battery health and think about a new pack |
| Phone dies while showing a fair charge | An aged cell cannot deliver power in short bursts | Get the pack tested by a technician |
| Gaps near the back panel or a lifting screen | The cell has swelled | Switch off and visit a technician today |
| Heat even with the screen off | A faulty pack or one app running wild | Restart, take off the cover, then get it examined |
Background apps and poor network often explain fast drain, so start with the page on fast battery drain. If that does not explain it, use the steps in checking battery health to judge the pack.
A bulging, warm or leaking pack is a fire risk. Stop charging, leave it unplugged, never squeeze or poke it and carry the phone to a service centre. Copies printed with huge mAh numbers are common, so trust the code and the weight, not the capacity claim.
Fitting a new BLP923 pack
Phones of this class are sealed, so leave the opening to the brand's service centre or a trusted local technician. Give them the phone name and the model number you wrote down, and have the code checked against the old sticker.
Examine the new pack closely before fitting:
- Its weight should be close to the old pack. A much lighter pack with a bold mAh number is a bad sign.
- The print should be sharp, with a batch or date mark.
- The claimed capacity should stay close to 5000 mAh. A pack claiming far more cannot be honest at this size.
More on fitting and what to ask is in the battery replacement guide.
Daily care for this pack
Heat and long hours at full charge wear a cell faster than anything else. Keep the phone in shade, take off a thick cover while charging if it gets warm, and avoid charging on a bed or sofa.
Prefer the original adapter, or any adapter of equal or lower rating, and replace a cable that heats at the plug. If the phone still dies early after rebooting and a complete charge, request a battery test before paying for a new pack.
Frequently asked questions
Which phones use the BLP923 battery model name?
Most listings give it to the Realme C51, one adds the C51s (RMX3765), and several sellers name the Oppo A57 4G, A57s, A77 5G and A78 5G. Read BLP923 off the old cell to be certain.
Is BLP923 the battery mobile model name for the Realme C51?
Yes, most listings say so for the C51 (RMX3830). The Realme C51 page covers the phone side, and your old label settles it.
How many mAh is a BLP923 battery?
It is listed at 5000 mAh. That is the typical figure, and the rated figure on your own label may be slightly smaller.
Is BLP 923 the same as BLP927?
No. The codes differ in the last digit, and a pack with a similar number may fit another phone. Match every character and the connector.
Can I fit BLP923 myself?
Sealed phones are best opened by a service centre or a reliable technician. Opening the back wrongly can damage the cell or the connector.
How do I spot a fake BLP923 pack?
Look for a much lighter weight, blurry print, no batch mark and a capacity claim far above 5000 mAh. Set it beside the old pack before fitting.