The BN5D battery model name is matched by replacement listings to three 4G phones: the Redmi Note 11, the Redmi Note 11S and the POCO M4 Pro 4G. Capacity is given as 5000 mAh typical, and these phones belong to Xiaomi's Redmi and POCO ranges. If your old battery label also reads BN5D, you have the right code.
Buyers type this code in different forms, for example "bn5d battery model" or "mi bn5d battery model name". The word Mi in that search is only a habit, because these are Redmi and POCO phones. Keep the Note 11 family apart in your mind as well. The Note 11 Pro range has similar names, but nothing here confirms those phones as BN5D users, so never order for them on the name alone.
Quick facts
Step by step
Write down the phone name and its model number
Open Settings and tap About phone. Note the device name and model number, or type model in the Settings search bar if it is not on the first screen.
Have the old label read by the technician
On a sealed phone the sticker shows only after the back is lifted. Ask the technician to read the code aloud or show you a clear picture before the pack is removed.
Compare code, mAh line and connector
The new pack should say
BN5D, show a capacity near the old one and have the same plug shape. Lay the two side by side on the counter.Judge the new pack by weight and print
Good print is sharp and carries batch details. A pack that feels clearly lighter than the old one, or promises far above 5000 mAh, should be refused.
What the BN5D battery model name tells you about your phone
The first two letters, BN, show up on a large share of Redmi and POCO packs, yet they only point to the maker group. The number and last letter pick the exact pack. For BN5D, replacement listings name the Redmi Note 11, the Redmi Note 11S and the POCO M4 Pro 4G. The three phones are close relatives in the same range, which fits with one pack serving all of them.
| Phone | Listing status | Remark |
|---|---|---|
| Redmi Note 11 | Matched by listings | Compare with the code printed on your old pack |
| Redmi Note 11S | Matched by listings | 5000 mAh typical |
| POCO M4 Pro 4G | Matched by listings | Not the 5G model of the same name |
| Redmi Note 11 Pro range | Not confirmed | Different phones, read their own label |
The Note 11S is also covered on the Redmi Note 11S battery page, so compare what that page says with the label in your hand. The label always wins over a list.
Note 11, Note 11S and M4 Pro: which one do you own
Most wrong orders start here. The Redmi Note 11 and Redmi Note 11S look alike on a shelf, and both names appear in the same listing titles. The POCO M4 Pro was sold as a 4G phone and also as a 5G phone. Listings tie BN5D to the 4G one only. The 5G phone is a separate model, and nothing here confirms its battery code.
Check the exact name on the box, then the model number under About phone. If the box is gone, the model number is enough for a technician to look up the right pack.
An owner asked for a POCO M4 Pro battery, and the counter had two different packs ready. The repairer lifted the back, saw BN5D on the label and matched it to the 4G phone. A 5G phone that came in the same afternoon needed another pack, so the two never got swapped.
How many mAh is BN5D: typical against rated
Adverts and spare part listings quote 5000 mAh, the typical value. Makers often print a somewhat smaller minimum (rated) value on the sticker too. It can change from batch to batch, so read the rated line on your own pack instead of guessing.
Comparing packs fairly also needs the voltage. For BN5D, multiply 5000 mAh by the label voltage and divide by 1000. When two packs have equal mAh but unlike voltage, the energy they hold is slightly different. No source confirms the voltage of BN5D, so check the figure printed on the label of the battery you have.
Treat big claims with suspicion. A BN5D copy that advertises far more than 5000 mAh for a phone whose own battery is 5000 mAh typical is a warning sign. A cell that fits the same space cannot honestly store that much more, so the number is just print.
Confirm the code before buying a replacement
The phone name alone is not enough to place an order. Three small checks save a second trip and a wasted pack.
- Match the phone model number first, then the code on the sticker.
- Ask the technician to compare the connector with the one on the old battery. A pack that has equal mAh but carries another code may not fit your phone.
- Keep a picture of the old label until the new pack is working.
The wider method for reading a code on any phone is in the battery model name guide.
When the old pack has swollen so much that the print is unreadable, ask the service centre to look up the code from your phone's model number instead of guessing from a shop shelf.
Codes that get mixed up with BN5D
At the counter the trouble is the last letter. Xiaomi packs such as BN5R, BN5J and BN5C sit close together in the list, and a faded sticker makes D, C and J hard to tell apart. Each has its own phones, so open BN5R, BN5J or BN5C if your label reads like one of them.
Do not assume that a nearby code will fit because the phone is the same size or class. One changed letter usually means a different pack. For all Xiaomi, Redmi and POCO codes together, see the Redmi battery model list.
Failing pack: what you notice and what to do
| What you notice | Likely reason | Next move |
|---|---|---|
| Percentage falls within hours | Cell has lost much of its capacity | Measure its health, then choose whether to swap |
| Phone switches off between 15 and 30 percent | Tired cell cannot supply peak current | Ask a service centre for a battery test |
| Screen lifts or back gaps open | Swollen cell | Stop charging it and visit a service centre today |
| Feels warm while resting | Faulty pack or a runaway app | Reboot, remove the cover, then ask a technician to look |
First rule out busy apps and poor network by reading why the battery drains fast. Once done, work through the battery health check guide to test the pack itself.
A cell that has bulged, turned hot or begun to leak may burst into flames. Pull the charger out straight away. Leave the back panel shut, and never squeeze or poke the battery. Move the Note 11 somewhere cool and shaded. Counterfeit batteries often show a made-up higher mAh figure and are easy to find in shops, so pick only a unit marked with the correct code.
Getting a new pack fitted safely
The back of these phones is sealed and many parts are stuck down with glue, so a home attempt may damage both the screen and the cell. Book it in with Xiaomi service or a Redmi repairer whose work you know. Tell the staff the phone's name and its model number, then have them check that BN5D matches the print on the battery you are replacing.
After the swap, charge the phone fully once and use it normally for a day. If the new pack runs hot or drains oddly, return to the same shop at once. More on the process is in mobile battery replacement.
Good care adds months of life: avoid charging in sun or under bedding, and try not to leave the phone plugged in through the whole night. Heat and long spells at 100 percent wear a cell sooner than ordinary use does.
Frequently asked questions
Which phones use the BN5D battery model name?
Replacement listings match BN5D to the Redmi Note 11, the Redmi Note 11S and the POCO M4 Pro 4G, all at 5000 mAh typical. Confirm it on the label of your old battery before ordering.
Is BN5D the Redmi Note 11 battery model?
Most listings give BN5D for the Redmi Note 11. A technician can verify it from the sticker as soon as the back is lifted.
What capacity is BN5D?
The listed figure is 5000 mAh typical. The rated (minimum) figure on your pack's label can be slightly lower, so check the print on the battery you own.
Does BN5D fit the POCO M4 Pro 5G?
Listings tie BN5D to the 4G model only. The 5G phone is a different model, so check its own label and do not assume a match.
Can I use BN5C or BN5R in place of BN5D?
Do not assume so. One changed letter usually means a different pack and possibly a different connector. Use the exact code your phone needs.
Why does a BN5D listing show much more than 5000 mAh?
That is most likely an inflated label on a copy. A cell of this size does not honestly hold much above 5000 mAh, so be careful.