The BN56 battery model name is given in listings for the Redmi 9A and the POCO C3, both budget phones from the Xiaomi group. Sellers list BN56 at 5000 mAh typical and 3.85 V. The Redmi 9C is also listed in markets where it was sold, but the evidence is thin, so your own cell should have the final say.
People often type this code as "redmi 9a battery model" or "poco c3 battery number". The phones look different from outside, yet they sit in the same size class, which is why one pack code can serve them. Sealed phones hide the sticker. On a Redmi 9A or POCO C3, BN56 is only readable once the back is open.
Quick facts
Step by step
Write down the phone name and model number
Open Settings, tap About phone and note the device name and model number. If it is not on the first screen, type model in the Settings search bar.
Have the old cell read under good light
Once the technician opens the panel, the code
BN56should sit on the sticker beside capacity and voltage. Do not peel or lever the pack yourself.Compare old and new packs together
Lay both packs on the counter. The code, the outline and the connector end must match, and the capacity should be near the old one.
Judge the print and the weight
Good packs have crisp text and batch marks. A pack that is noticeably lighter, or claims far more than 5000 mAh, should be refused.
Phones that use the BN56 battery model name
The letters BN point to Xiaomi, which covers Redmi and POCO. They do not tell you the exact phone. For BN56, the listings name the Redmi 9A and POCO C3, and some also name the Redmi 9C. These phones share a body size and a 5000 mAh class battery, so a common pack is believable.
| Xiaomi handset | Match status | Note |
|---|---|---|
| Redmi 9A | Listed as a BN56 phone | Entry phone with a 5000 mAh pack; confirm on your own cell |
| POCO C3 | Listed as a BN56 phone | Sold in India; same size class as the Redmi 9A |
| Redmi 9C | Listed, but check the model number | Not sold in every market, so not counted in the fits list |
| Redmi 9 Activ | Not confirmed | Read the sticker before ordering |
| Redmi 9 and Redmi 9 Prime | Different code | Do not treat as BN56 phones |
For the Redmi 9A alone, see our Redmi 9A battery page. If a Redmi 9A cell reads anything other than BN56, the label wins.
Rated and typical figures for BN56
BN56's 5000 mAh is the typical number used by Xiaomi and parts sellers. Makers often print a rated figure, a little lower, on the cell sticker itself. No rated BN56 value is confirmed, so read your own cell.
BN56 at its listed 3.85 V comes to about 19.3 Wh. A POCO C3 pack printed with a different voltage would not match that BN56 energy figure.
A Redmi 9A or POCO C3's runtime rests on screen, signal, brightness and apps. For more on what 5000 mAh means in daily use, see the 5000 mAh phones page.
How to confirm BN56 before you pay for a pack
A name search is a start, not proof. Phone makers sometimes change the battery inside the same model between batches, and a seller may list one code for many phones. Line up the old BN56 marking, the 9A or C3 model number and the plug shape.
One POCO C3 owner ordered by phone name and received a pack made for a different Redmi. It looked right and had a similar capacity, but the connector end sat a few millimetres off. The technician read BN56 from the old sticker, asked for that exact code and the pack seated cleanly.
The counter rule is simple: same code, same connector, similar capacity. If any one of these three fails, send the pack back.
Photograph the BN56 sticker before the old cell goes in the bin. It saves a second trip if the first pack is wrong.
Codes and phones mistaken for BN56
Xiaomi codes are close to each other, and a single changed letter or digit can mean a different phone. BN54 and BN5R are neighbours people mix up in speech. Each is covered on its own page: BN54 and BN5R. Never swap one for another just because the capacity looks close.
- The Redmi 9 and the Redmi 9A have similar names but are not the same phone. Compare the full model number.
- Redmi 9 Activ is a close relative of the 9A, yet its code is not confirmed here, so check the sticker.
- Faint print can make 5 and 6 look alike. Tilt the sticker under a bright lamp.
Every Xiaomi family code appears in our POCO and Redmi battery hub.
Signs that a BN56 battery is wearing out
Budget phones from this class are often kept for many years, so a tired pack is common. Use the table to match what you see with a sensible next move.
| Redmi 9A or C3 sign | Why | BN56 action |
|---|---|---|
| Percentage drops by half within a few hours of light use | BN56 has lost much of its capacity | Check battery health, then book a swap |
| Phone switches off while still showing 15 to 30 percent | Tired BN56 sags under load | Get it tested before it fails fully |
| Back panel gaps or screen lifts at the edge | Swollen cell | Unplug and visit Xiaomi service that day |
| Phone is warm on a table with no app running | Worn BN56 or a stuck app | Restart the C3, drop the case and test the BN56 |
Heavy apps and weak network also drain a good battery, so first read what makes a battery drain fast. Then test your battery's health to see whether the cell itself is at fault.
Swelling, heat, leaking or a dent turn a BN56 into a fire hazard. Stop charging the 9A at once, leave the cell alone and keep the phone cool. Have a service centre look at it. Knock off BN56 packs tend to inflate their capacity, so take nothing but the exact code.
Fitting a new BN56 safely
These phones have a closed back, and the pack is glued or tightly fixed. Do not try to pry it out with a blade. Ask Xiaomi service or a repair counter you trust to fit BN56, quoting the Redmi 9A or POCO C3 model number.
Spotting a weak copy is mostly about your hands and eyes:
- It feels light next to the old cell.
- BN56 lettering is smeared with no batch details.
- It claims more than 5000 mAh, too much for a 9A sized pack.
A wider look at how swaps are done is on the replacement overview.
Everyday care for a BN56 pack
Phones in this class are often left on charge overnight, and heat plus a long stay at full charge wears a cell sooner. Set the POCO C3 on a hard desk to charge, away from pillows and windows, and pull off a bulky cover if it gets warm.
The 9A and C3 shipped with 10 W chargers, ideal for BN56. A 9A that still dies early after a reboot and a full charge should have its BN56 tested before you buy anything.
Frequently asked questions
Which phones take BN56?
Listings match BN56 to the Redmi 9A and the POCO C3, with a 5000 mAh typical pack. A few sellers add the Redmi 9C. Because the evidence is limited, check the old cell's sticker before ordering.
Is BN56 the Redmi 9A battery model?
Listings say so. With the back off, the BN56 sticker confirms it.
What capacity is BN56?
Listings give BN56 as 5000 mAh typical and 3.85 V. Your BN56 may print a slightly lower rated figure.
Will a BN56 battery fit the POCO C3?
Listings include the POCO C3 among BN56 phones. Still, compare the code and the connector with the old pack before fitting.
Can I use BN54 or BN5R instead of BN56?
Do not take that for granted. A different code may belong to another phone, and the connector or outline may not match. A phone built for BN56 needs BN56.
How can I tell a fake BN56 battery?
A fake BN56 feels light, prints blurrily without batch marks and claims far above 5000 mAh. Weigh it and inspect its print against the old BN56.