The BM5R battery model name belongs to the Xiaomi group, and most spare part listings match it to two phones: the Redmi 12 5G and the POCO M6 Pro 5G. The usual figure quoted is 5000 mAh, with 3.87 V marked on the cell, which is close to 19.4 Wh of energy. If you typed "redmi 12 5g battery model number", the code you want is most likely BM5R. It is a different thing from the phone's own model number.
Many people type this code as "bm 5r" with a space, or mix it up with BN5R, which has one letter changed and a different phone list. The code is printed only on the sticker of the cell. On a sealed phone you can read it once a technician opens the back. Check your old label first, because a label in your hand is better than any list, including this one.
Quick facts
Step by step
Write down the phone name exactly
Open Settings and tap About phone. Note the device name and whether it says 5G. If you cannot find it, type model in the Settings search bar.
Keep the box or invoice nearby
The box label carries the full model number. It helps the technician when two phones with nearly the same name are on the counter.
Ask for the old sticker to be read
After the back is opened,
BM5Rshould show on the battery label beside the capacity and voltage. Do not try to pull the battery out yourself.Compare old and new packs side by side
Code, connector shape, size and weight should all match. Reject a pack whose print is smudged or has no batch marking.
Phones that use the BM5R battery model name
The letters BM point to the Xiaomi group, which includes Redmi and POCO, and nothing more. The phone list below comes from spare part listings, and most of them agree on two names. A listing can still be wrong for a particular batch, so your own pack has the final word.
| Phone | Status | Note |
|---|---|---|
| Redmi 12 5G | Named in most listings | Quoted at 5000 mAh typical |
| POCO M6 Pro 5G | Named in most listings | Confirm on the old label before ordering |
| Redmi 12 (4G) | Not confirmed | Do not assume the same pack |
| Any other Redmi or POCO phone | Not matched | Read the code on your own label |
Neighbouring codes of the same group are collected in the Redmi, Xiaomi and POCO code hub, which is the quickest way to move on if your label says something else.
Redmi 12 5G or Redmi 12: check which one you hold
The Redmi 12 and the Redmi 12 5G sit close on a counter and carry almost the same name. Only the 5G one is matched to BM5R in most listings. The plain Redmi 12 may use another pack, so never order from the name alone.
Look at the box, or at About phone in Settings, and see whether 5G is part of the name. If the phone is already open, the sticker on the cell decides everything. The same care applies to the POCO M6 Pro 5G, which should not be mixed with other POCO M6 phones.
A customer came in asking for a "Redmi 12 battery" for a phone that was really the 5G version. The shelf held a pack made for the 4G phone. The technician opened the back, saw BM5R on the old sticker and asked for that exact code. The phone name had been the only thing the two orders shared.
How many mAh is BM5R: typical, rated and watt hours
Listings and adverts quote 5000 mAh, which is the typical value. Many Xiaomi group packs also show a rated (minimum) value on the label, a little below the typical one. Nobody has confirmed this value for BM5R. Read it off the sticker on the cell in your own handset.
Two packs can be compared by their energy, and the sum is easy. Take the mAh figure and multiply it by the voltage. Then shift the result down by dividing by 1000. A cell of 5000 mAh running at 3.87 V comes to about 19.4 Wh. Cells with equal mAh can still hold different energy if their voltages differ. So watt hours give a more honest comparison.
Hours of use per charge hinge on the chip, screen size, signal, brightness and which apps stay running. A full day of mixed use is a fair guess for a 5000 mAh phone, though your result may be shorter or longer. Charging time is set by the watts of the charger, so pack size alone does not tell you how long a refill takes.
BM5R, BN5R and other codes people mix up
At the counter, the trouble is usually one letter. BM5R and BN5R differ only in the second character, and their phone lists differ too. The BN5R page gives its own phones, so open it if your old label reads that code.
- When the print has faded, M can look like N, and R can look like K. Turn the label in bright light and watch the letters. You can also ask the seller for a close-up picture.
- Matching mAh alone will not make a pack fit your phone. Even with 5000 mAh, a pack carrying a different code may have another connector or a different size.
- Codes like BN5Q are separate entries with their own phones. Do not carry the BM5R phones across to them.
When in doubt, match three things together: the code, the phone name and the connector.
Signs your BM5R battery is wearing out
| Symptom | Usual cause | Next move |
|---|---|---|
| Percentage falls by half in an hour of light use | Worn cell or a heavy background app | Test with a battery health check |
| Phone switches off while still showing some charge | Tired cell cannot meet sudden power demand | Get the cell load-tested at the counter |
| Screen lifts or the back panel gaps open | Swollen cell | Unplug the phone and carry it to service that very day |
| Hot to the touch with the screen off | Bad cell or an app stuck running | Restart, take the cover off, then have it looked at |
Before blaming the battery, read the causes of quick battery drain, because signal, brightness and apps explain many complaints. Then run the battery health check to see where you stand.
If the pack looks puffed up, feels very hot, leaks or has been hit by a sharp object, treat it as a fire hazard. Unplug the phone, never squeeze or bend it, keep it far from heat and let the service staff handle it. Cheap copies with big mAh claims are common, so ask only for the exact code.
Getting a new BM5R pack fitted
Both phones are sealed designs, so a professional should open the back. Go to an authorised centre of the brand, or to a workshop whose work you already know. Tell them the phone name and have them compare the old sticker with the new pack before fitting.
A weak copy is easy to spot if you look closely:
- The new pack feels clearly lighter on your palm than the old cell.
- The print is blurred, with no batch or date marking.
- Its label promises far beyond 5000 mAh in the same volume, which no honest cell of this footprint can deliver.
Fitting steps and questions to ask are covered in mobile battery replacement.
Before the old pack goes into the bin, take a photo of its sticker. Then the code is saved on your phone for the next time.
Everyday care for a 5000 mAh phone
These phones are often used all day for video, maps and calls, and then plugged in overnight. Heat does more harm than the number of charges. Keep the phone out of direct sun, off the bed while it charges, and take off a heavy cover if the back turns hot.
The best choice is the original charger sold in the box, or else a quality one with a close rating. If a cable plug gets warm, stop using it and discard it. Avoid leaving the phone at 100 percent for many hours. Switch the phone off and on once, then charge it to the top. Should the battery still run down too soon, have it checked first. Only then think about buying a new pack.
Frequently asked questions
Which Redmi and POCO phones take BM5R?
Most listings match BM5R to the Redmi 12 5G and the POCO M6 Pro 5G, sold at 5000 mAh typical. Read the sticker on your old battery before you buy.
What is the Redmi 12 5G battery model number?
Most listings give the battery code as BM5R. This is not the phone's own model number, which you find on the box or under About phone in Settings.
Is BM 5R the same as BM5R?
Yes, it is the same code typed with a space. The correct written form is BM5R, with no gap.
Can I put a BN5R battery in a Redmi 12 5G?
Do not assume so. The two codes differ in one letter and are matched to separate phones. Ask the technician to compare the code and the connector.
Is the BM5R battery 5000 mAh?
Sellers list 5000 mAh as the typical value. The minimum rated value printed on the label may be a little less, so read the sticker on your own battery.
How can I tell if a BM5R battery is fake?
A fake pack is usually lighter, has weak print without batch details and claims more mAh than the original. Compare it with the old pack before fitting.