The BN5K battery model name is matched by listings to the Redmi 12C, a budget phone from Xiaomi. Sellers offer BN5K as a 5000 mAh typical cell. Anyone who types "redmi 12c battery model name" will land on this same code, so it is the one to carry to the counter.
BN only identifies the Xiaomi group, which covers Redmi and POCO handsets. They do not tell you the phone, so a BN pack from another Redmi can look the same and still be wrong. A sealed Redmi 12C hides the BN5K print under its back, so the panel must come off before anyone can read it. This page shows how to confirm that code before you pay.
Quick facts
Step by step
Read the model number in Settings
Open Settings, then About phone, and note the device name and model number. If you cannot find it, type model in the Settings search bar.
Have the back opened by a technician
The Redmi 12C is a sealed phone, so ask a repair person to lift the back panel. Do not pry at the battery yourself.
Read the code and capacity on the sticker
Look for
BN5Kprinted beside the capacity and voltage. Ask for a clear photo, because worn print is easy to misread.Compare the new pack before fitting
Hold both packs together. Code, connector shape, size and weight should all agree.
Test the phone after the swap
Charge it fully once, then watch the percentage for a day. A sudden drop or a hot back means the pack needs to be inspected again.
Which phone uses the BN5K battery model name
Listings for BN5K name one phone: the Redmi 12C. That matches what the code family suggests, since BN packs serve many Redmi and POCO phones. Still, a code family never proves a fit, so the phone list below says how sure each line is.
| Phone | Status | Note |
|---|---|---|
| Redmi 12C | Listed for the Redmi 12C | 5000 mAh typical; confirm on the cell sticker |
| POCO C55 | Not confirmed | Close in design to the Redmi 12C, but a look is not proof of a shared pack |
| Redmi 10A and Redmi 10C | Not confirmed | Similar class of phone, battery code must be read from the label |
| Redmi A3 | Not confirmed | Not shown to take BN5K; the A3 comparison page explains, then check the cell |
If your Redmi 12C came in a regional version, read the label even then. Makers sometimes change a cell supplier within a model and the sticker is the only honest record.
Rated and typical capacity for BN5K
Xiaomi and sellers quote 5000 mAh for BN5K, which is the typical figure. Xiaomi cells commonly add a rated minimum a shade below that. Read that number off your own sticker, since this page cannot confirm it for every batch.
Energy is mAh multiplied by volts, then divided by 1000. We have not confirmed a BN5K voltage, so take it from the Redmi 12C cell label. As a guide, a typical Li-ion phone pack runs near 3.8 V, which would put 5000 mAh at roughly 19 Wh. Treat that as an estimate only.
A 12C's endurance rests on its display, signal, brightness and apps as much as on the 5000 mAh rating. A fresh 5000 mAh pack in an entry-level phone usually carries a normal day, but a weak network can cut that sharply.
Match BN5K before ordering a Redmi 12C battery
Most wrong BN5K orders start with a search by phone name alone. Phone names cover several versions, and sellers often list one pack against many handsets. The safest path is to confirm three things together: the code, the connector and the model number of your phone.
- Note the model number from About phone or from the box.
- Ask for the old BN5K sticker to be read while the 12C is open.
- Order only if that sticker says
BN5K.
A Redmi 12C owner brought a pack that the counter had matched by phone size. The pack carried a code one character away from BN5K and its connector sat a little off. Comparing it with the original Redmi 12C cell, the technician spotted the wrong code and returned the pack unused.
Photograph the old sticker before the cell leaves your sight. That photo settles any later argument about what was fitted.
Similar codes and phones that get confused with BN5K
Xiaomi codes differ by a single letter or digit, and the print on aged stickers fades. Three habits help.
BN5K,BN5JandBN5Rlook alike at a glance. Each has its own page, so open BN5J and BN5R to see which phones they are listed for.- A pack with the same mAh is not the same pack. Shape, connector and code must agree too.
- Phones that share a body style, such as the POCO C55 and the Redmi 12C, may still use different batteries. Read the label.
Every Xiaomi, Redmi and POCO code in one place is on the Redmi battery model list. Holding a loose cell with no phone? The battery model name finder guide covers the other ways to identify a loose BN5K.
Signs the pack in a Redmi 12C is wearing out
| Redmi 12C sign | Most likely | BN5K step |
|---|---|---|
| Percentage falls a few points every minute | Worn cell holding less charge | Test it, then plan a BN5K swap |
| Phone dies while still showing 25 percent | Weak cell cannot supply peak current | Get it tested by a technician |
| Rear panel or screen edge starts lifting | Swollen cell | Stop charging and get it inspected today |
| Back feels hot with the screen off | Faulty pack, bad cable or a stuck app | Restart, try another cable, then test the phone |
Before blaming BN5K, rule out apps and weak signal with our page on fast battery drain. After that, the battery health check tells you whether the Redmi 12C pack really is worn.
A BN5K that swells, overheats, leaks or gets dented can ignite. Unplug the charger, do not press, bend or pierce the phone, and keep it away from heat. Have it checked at a service centre. Fake packs often print a capacity far above what the cell can hold, so accept only an exact code match.
Replacing BN5K in a Redmi 12C safely
The Redmi 12C has a sealed body with glued parts, so opening it carelessly can crack the screen or tear the cell. Hand the 12C to Xiaomi service or to a well regarded local Redmi repairer. Quote the 12C model number and ask them to check BN5K on the cell coming out.
These signs point to a poor copy:
- The pack is clearly lighter than the one you removed.
- Print is smudged and there are no batch details.
- Its label claims capacity far beyond the 5000 mAh a 12C pack can hold.
Our page on mobile battery replacement covers fitting and the questions to ask.
Daily care for a 5000 mAh budget pack
Budget phones are often charged overnight, in warm rooms, with whatever cable is nearby. Heat and all night charging at 100 percent wear a BN5K out faster than anything else. Charge the 12C on a firm surface, slip off a heavy cover if it warms up, and unplug at full when convenient.
Charging time depends on the charger wattage and cable. Stick to the 12C's boxed charger or one no stronger, and throw out any cable that heats near the plug. After a swap, give the new pack a full charge and a normal day of use before judging it.
Frequently asked questions
Which phone uses the BN5K battery?
Sellers pair BN5K with the Redmi 12C at 5000 mAh typical. Other Redmi and POCO models are unconfirmed for BN5K, so read your cell if you own something else.
What is the Redmi 12C battery model name?
Listings give it as BN5K. A technician can confirm it by reading the sticker once the back panel is open.
How many mAh is the BN5K battery?
Listings give BN5K as 5000 mAh typical. Your 12C cell may print a slightly lower minimum, so check it.
Can I use a BN5J or BN5R battery in place of BN5K?
Do not take that for granted. Another code may mean another outline or connector even at 5000 mAh. Fit only a pack with the same code.
Does the POCO C55 use the BN5K battery model name?
It is not confirmed here. The POCO C55 looks close to the Redmi 12C, but a similar look is not proof, so read the code on its own battery.
How can I tell a fake BN5K battery?
Fakes tend to feel light, carry smudged print, show no batch marks and claim a capacity well above 5000 mAh. Compare weight and print with the old pack.