Most listings match the BN47 battery model name to two Xiaomi phones, the Redmi 6 Pro and the Mi A2 Lite, at about 4000 mAh typical. The maker group is Xiaomi. These two phones are the same hardware sold under different names in different markets, which is why one battery code covers both.
People often type this code as "bn 47 battery" or just "redmi 6 pro battery model". Both phones are old now, and many are on their second or third battery. So the pack you hold may not be the one that came from the factory. Read the BN47 sticker inside your phone before ordering.
Quick facts
Step by step
Write down the exact phone name and model number
Open Settings, tap About phone and note the device name and model number. If you cannot find the model number, type model in the Settings search bar.
Have the old pack read by a technician
On this phone the back is sealed, so a technician must open it. The code
BN47should be printed on the cell sticker together with the capacity. Do not lever the pack out on your own.Compare code, capacity and connector
Keep the new pack beside the old one. The code must match letter for letter, the capacity should be close, and the plug shape on the short flex must look the same.
Inspect weight and print before it goes in
A genuine-looking pack has sharp print, batch details and a weight near the old one. A very light pack that claims a large mAh figure should be refused.
BN47 battery model name and the phones it suits
The letters BN tell you the pack is a Xiaomi group battery, and nothing more. The number 47 is what separates it from its neighbours. Most listings give two phones for BN47: the Redmi 6 Pro and the Mi A2 Lite. In India the phone was sold as the Redmi 6 Pro, while the Mi A2 Lite name was used in other markets, so a shared pack makes sense.
| Xiaomi handset | Status | Note |
|---|---|---|
| Redmi 6 Pro | Matched by most listings | About 4000 mAh typical |
| Mi A2 Lite | Matched by most listings | Same body as the Redmi 6 Pro |
| Mi A2 | Different battery | Not a BN47 phone, see the BN36 page |
| Redmi 6 and Redmi 6A | Unconfirmed for BN47 | Different phones; read their labels |
If your phone is not listed, do not stretch the BN47 list to fit it. Check the code on your own cell against our Redmi code list.
What 4000 mAh means on this pack
The 4000 mAh figure is a typical value, the kind quoted by sellers and in part listings. The cell sticker often carries a second, slightly lower number as well, the minimum rating. For BN47, copy that minimum from your own pack, because the value can change from one batch to another.
If you want energy in watt hours, take the volts printed on the sticker, multiply with the capacity in mAh and divide by a thousand. A different voltage on a 4000 mAh Redmi 6 Pro pack changes its energy, so check volts too.
A phone of this age has a modest display and a plain charging system, and a new pack gives a full day of ordinary use. A pack that is several years old gives much less than 4000 mAh in real life, even if the label still says so.
Confirming the code before you pay
The BN47 sticker on the old cell is the firmest proof. Ask the technician to read it aloud and to photograph it for you. On faint prints, the digits 4 and 6 can look close, and so do 7 and 1, so use strong light.
A customer with a Redmi 6 Pro asked for a pack "BN46 or 47, whichever is in stock". The technician opened the back, read BN47 on the old sticker and refused the other pack. A one digit gap decided which of the two would have plugged in and charged correctly.
When the Redmi 6 Pro is within reach, copy its model number from About phone and add BN47 from your photo. Both should agree with the listing before you order.
Look-alike codes that cause counter mistakes
Xiaomi group codes run in long series, and neighbours in number are not neighbours in phone. Each one below has its own page, so check the phones there rather than guessing.
- BN46 is one digit below BN47 and is a different pack.
- BN48 is one digit above and also belongs to other phones.
- BN36 is the code people confuse with the Mi A2, the cousin of the Mi A2 Lite.
Another 4000 mAh Xiaomi code could differ from BN47 in outline or plug. Do not trust the capacity alone.
When an old BN47 pack starts to fail
| Redmi 6 Pro symptom | Behind it | Next step for BN47 |
|---|---|---|
| Redmi 6 Pro percentage drops in jumps | Worn BN47, readings drift | Test the health first, then book a new pack |
| Redmi 6 Pro dies at 25 to 30 percent | Cell cannot give current under load | Have Xiaomi service test the BN47 |
| Mi A2 Lite back or screen edge lifts | BN47 has swollen | Unplug the Mi A2 Lite and go today |
| Handset stays warm doing nothing | Worn BN47 or a stuck app | Restart the Redmi 6 Pro, drop its cover, test BN47 |
For a phone this old, apps and weak signal are not the only reason. Age alone can do it. Try the page on checking battery health first, and read the causes of quick drain on this drain page.
Should BN47 bulge, overheat, seep or dent, it may ignite. Disconnect the Mi A2 Lite immediately and keep heat and pressure away from the cell. Take it to Xiaomi authorised service. Cheap BN47 copies routinely overstate their mAh; buy the exact code only.
Fitting a BN47 properly
The Redmi 6 Pro is sealed, so let a professional open it. Xiaomi service or a trusted shop has the tools to lift the Redmi 6 Pro back without cracking it. Give them the Redmi 6 Pro or Mi A2 Lite model number and have them hold BN47 against the old label.
Signs of a copy BN47:
- It is visibly lighter than the outgoing BN47.
- Lettering on the BN47 is blurred with no batch detail.
- The label claims much more than 4000 mAh in the same size body.
See our replacement guide for more on fitting.
After fitting BN47, charge the Redmi 6 Pro to full once and watch it for the first day. A pack that heats up or drops fast on day one should go back to the shop.
Looking after an older Xiaomi phone
With an older phone the aim is to slow further ageing. Keep it out of direct sun and off soft beds while charging. Remove a thick cover if the Mi A2 Lite warms. Use a sound charger and cable with the Redmi 6 Pro, and change a lead whose plug heats.
Sitting at 100 percent for hours strains BN47, so unplug when convenient. Early shutdowns that survive a reboot and a full top up on the Redmi 6 Pro point squarely at BN47.
Frequently asked questions
Which phone uses the BN47 battery model name?
Most listings match BN47 to the Redmi 6 Pro and the Mi A2 Lite, at about 4000 mAh typical. Your old cell's BN47 print is the final word.
Does the Redmi 6 Pro use BN47?
Most listings say it does. With the back lifted, BN47 can be read on the cell.
What capacity does BN47 have?
Listings give about 4000 mAh typical. The BN47 label may show a rated figure slightly under 4000 mAh.
Can I use a BN46 or BN48 battery in place of BN47?
Do not assume that. BN46, BN48 and other near codes fit different phones with different plugs. Fit only the exact code.
Is the Mi A2 battery the same as BN47?
No, the Mi A2 and Mi A2 Lite are different phones with different cells. Most listings give it another code, so check the BN36 page.
How can I tell a fake BN47 battery?
Fakes are usually lighter, with blurred print, no batch marks and a claimed size well over 4000 mAh. Compare weight and BN47 code with the old cell.