The BN5X battery model name points, in most spare part listings, to a single phone: the Redmi 14C. The pack is listed as 5160 mAh typical at 3.84 V, and the maker is Xiaomi. A few listings also attach other Redmi and POCO phones to this code, but they disagree with each other, so treat the Redmi 14C as the only likely match and check the label first.
People also type it as "bn 5x battery model name" with a gap. It is the same code. On a sealed phone the sticker can be seen only after the back cover is lifted by a repair technician, so the safest step is to read the old label first and then order the pack.
Quick facts
Step by step
Write down the phone name and model number
Open Settings, tap About phone and note the device name. If the model number is not shown, type model in the Settings search bar.
Have the old pack label read
Ask the technician to show you the sticker after the back is opened. The code
BN5Xshould be printed beside the capacity and voltage.Compare the new pack with the old one
Lay both packs side by side. The code, the connector and the outline should match, and the capacity should be close to the old figure.
Check weight and print before fitting
A genuine-looking pack has crisp print and batch marks. A pack that is clearly lighter than the old one, yet claims more mAh, should be refused.
Which phone uses the BN5X battery model name
The two starting letters BN tell you the pack comes from the Xiaomi family of brands, covering Redmi and POCO. That alone cannot name the phone. For BN5X, the clearest listing names the Redmi 14C, with two maker model numbers shown beside it. Other listings add more phones, some with much bigger batteries, and that is a reason for care.
| Phone | Standing | Remark |
|---|---|---|
| Redmi 14C | Most listings match it | 5160 mAh typical at 3.84 V; model numbers in listings are 2411DRN47C and 2409BRN2CA |
| POCO M7 4G | Named by one listing | Not confirmed, read the label first |
| Redmi 15 4G and Redmi 15 5G | Named by one listing | Not confirmed; the capacity given for them looks doubtful |
| Redmi 13C | Not matched | Different phone, check its own code |
If your old pack shows BN5X, that label settles it, whatever the phone name. If it shows a different code, do not buy BN5X. For every code in this family, open Redmi battery model list.
BN5X capacity: typical figure and the label figure
The 5160 mAh value is what adverts and parts listings quote, which is the typical capacity. Xiaomi usually prints a somewhat lower rated value on the pack too. For BN5X that rated value is not clear from listings, so read it off your own pack and ignore any seller's text.
For BN5X, watt hours express the stored energy in a single number. Take the mAh rating and multiply it with the volts. After that, divide the figure by 1000. A 5160 mAh pack rated at 3.84 V comes to about 19.8 Wh. Sometimes two packs list the same mAh but work at different volts. In that case, their energy is not the same, so check the voltage line as well.
Do not expect a fixed number of hours from the pack. Screen-on time depends on brightness, network signal, the chip and the apps you use.
Checking the code before you place an order
Many bad purchases begin when someone searches the phone name and trusts the first pack shown. Work in this order. First, get the exact phone name from the box, and the model number under About phone. Second, have the old label read. Third, match the code letter by letter, because BN5X, BN5K and BN5R look alike in poor print.
A customer brought a phone with a weak battery and asked for a 5000 mAh pack, since that was the number he remembered. The technician opened the back and the sticker said BN5X, listed at 5160 mAh. The pack first offered carried a different code, so it went back and the correct one was fitted.
If the label is torn or faded, ask the brand's service point to look the phone up by model number instead of guessing from the capacity.
Codes that get mixed up with BN5X
One letter changes the phone. BN5R and BN5D are separate packs with their own phone lists, and an equal mAh figure under another code can still mean a different connector or outline. BM5R differs again in its first two letters.
- X, K and R can look alike when the sticker print is faint. Read the code under bright light.
- The Redmi 14C and the Redmi 13C are neighbours in name, not twins in battery. Do not carry a code from one to the other.
- A pack sold for a phone with a much larger battery will not suit this phone, even if the code seems close.
Signs of an ageing pack and your next move
| Redmi 14C symptom | Probable cause | BN5X action |
|---|---|---|
| Percentage drops quickly | Cell used up by many full cycles | Test the battery first, then fix a replacement visit |
| Phone dies near 20 percent | Weak cell cannot deliver peak current | Get the pack tested |
| Rear cover rises or display bulges | Gas build up inside the cell | Stop using it the same day |
| Hot while idle | Faulty pack or a stuck app | Restart, take off the case, then have it examined |
Quick drain is often an app or weak signal problem, so read common causes of quick battery drain first, and use the health check guide to decide.
If the cover is rising, the display is bulging or the pack smells sharp, unplug the charger and leave the pack alone. Do not press or bend it. Move the phone away from warmth and get it inspected the same day. Copies that print a bigger mAh number than the cell can hold are common, so insist on the exact BN5X code.
Fitting a new BN5X pack safely
The Redmi 14C is a sealed phone, so the cover must be lifted by someone who does it daily. Go to the brand's service point or a repair shop you already trust. Carry the model number and ask for the old code to be read before the new pack is placed.
Look for these faults in the new pack:
- It weighs less than the pack taken out.
- The print is blurred and no batch mark is visible.
- The label claims far above 5160 mAh, more than a cell this size can honestly hold.
Fitting basics are covered in mobile battery replacement.
Photograph the old sticker before it is discarded. If the new pack gives trouble, the photo is your proof of the original code.
Daily care for a 5160 mAh pack
Plenty of budget phones are left on the charger all night. Warmth plus this habit ages the cell faster than normal daily use. While charging, keep the phone away from soft bedding and out of strong sunlight. If the body of the phone turns hot, take off any thick case.
Use the adapter supplied with the phone, or a sound one meant for it. Replace any cable that gets hot near the connector. Charging time depends on the adapter watts, but the phone draws only the power it supports, so a bigger adapter will not charge it faster.
Frequently asked questions
Which phone has the BN5X battery model name?
Most listings link BN5X with the Redmi 14C, usually rated 5160 mAh and 3.84 V. Some sellers name more phones, but nobody has confirmed those. Check what is printed on the pack that is in your phone now.
How many mAh is a BN5X battery?
It is listed as 5160 mAh typical. The minimum figure on the sticker can be lower, so look at your own pack.
Is BN 5X the same as BN5X?
Yes. People add a space when they search, but the code printed on the pack is BN5X.
Can I use a BN5R pack in place of BN5X?
No, that is not safe to assume. Just one letter sets the two codes apart, and each may fit a different phone. Match the whole code, and also look at the shape of the connector.
What gives away a counterfeit BN5X?
Look for blurry print, no batch mark, low weight and a capacity far above 5160 mAh. Compare it with your old pack.
Can I change the battery of my Redmi 14C myself?
It is a sealed phone, so a trained technician should do it. Opening it carelessly can damage the cell or the screen.