The Redmi 9 battery model name most people want is for the Redmi 9A, and most listings give it as BN56, a pack of 5000 mAh typical. The Redmi 9C is listed with the same code. The plain Redmi 9 is a different phone, and listings give it a different pack, so do not order by the number 9 alone.
Searches such as "mi 9a battery model name" and "redmi 9a battery model number" all point to the same thing: the code on the cell sticker. The code tells the technician which pack goes in. This page shows the phones that share it, where to read it, and how to avoid a wrong or fake pack.
Quick facts
Step by step
Read the exact phone name on the box
The retail box or the sticker on it shows the full name. Check whether it says Redmi 9A, Redmi 9, Redmi 9i or Redmi 9C. Each is a separate phone.
Open the model number screen
Go to Settings and tap About phone. If the model number is not on the first screen, type model in the Settings search bar. Write it down for the repairer.
Let a technician read the cell sticker
The 9A body is sealed, so the sticker shows only after the back is opened by a professional. Ask for a photo of it, with the code, capacity and batch marks in view.
Compare the new pack with the old one
Same code, a similar capacity and the same connector shape. Hold both on your palm: the weight should feel alike.
Redmi 9 battery model name: BN56 and its phone family
Xiaomi uses the letters BN for many Redmi packs, but the letters only name the maker group. Most listings give the Redmi 9A BN56. Those listings add the Redmi 9C, which makes sense since it shares the 9A's size and class.
| Phone | Battery status | Note |
|---|---|---|
| Redmi 9A | Most listings say BN56 | 5000 mAh typical |
| Redmi 9C | BN56 in most listings | Check the old BN56 label |
| Redmi 9 | Different pack | Most listings give BN54 for it |
| Redmi 9i | Not confirmed | Do not assume BN56 |
| Redmi 9A Sport | Not confirmed | Match by the label |
The full code story, with its own phone list, is on the BN56 page.
Redmi 9 and Redmi 9A are not the same pack
The name "Redmi 9 battery model" brings two phones together in one search. The Redmi 9A is the entry phone. The Redmi 9 sits one step above it, with a different body and a different pack. Most listings give the Redmi 9 as BN54, so a BN56 pack bought for it can be the wrong shape or have a different connector.
Phone names in this family are easy to mix up when a customer speaks them fast. Say the letter every time: nine, nine A, nine C. The letter is the whole difference at the counter.
A student brought a phone that kept dying and said only "Redmi 9 battery please". The shop held out a 5000 mAh pack. The technician opened the back first and found a Redmi 9A with BN56 on the sticker, then fetched that exact code. Had the phone been a plain Redmi 9, the pack in hand would have been wrong.
Capacity of the Redmi 9A battery: typical and rated
BN56's 5000 mAh is the typical capacity printed in adverts and spec sheets. Xiaomi's rated figure is the floor each cell must reach, normally a little lower. It is printed on the pack, so read it off your own sticker rather than trusting a list.
To turn mAh into watt hours, change it to amp hours and multiply by the voltage. BN56's voltage is not confirmed here; taking 3.85 V purely as an example, 5 Ah gives about 19.3 Wh. Read the real voltage from the sticker.
How long a Redmi 9A lasts turns on its display, reception, brightness and apps. A 5000 mAh pack on a low-power phone like this often lasts a full day of light use, but that is not a promise.
Locating BN56 on your Redmi 9A or 9C
The real code sits on the cell itself. The Redmi 9A has a sealed back, so a user cannot see it without opening the phone. The Redmi's settings show its exact name and model number, enough for a repairer to look up the pack. Some Xiaomi software builds list battery details on the battery page; names vary, so type battery into the search bar inside Settings.
- Box sticker: the name and model number of the phone.
- Settings, About phone: the same model number, handy if the box is gone.
- Cell sticker: the real code, capacity, voltage and batch marks, visible only with the back off.
When the back is open, take a clear photo of the sticker before anything is removed. Keep that photo to show any repair shop later.
Our label reading guide collects methods for every brand.
Signs the Redmi 9A battery is wearing out
| Redmi 9A symptom | Likely reason | What to do |
|---|---|---|
| Redmi 9A loses half its charge within hours | Worn BN56 or a heavy app | Rule out apps first, then test the pack |
| 9A turns off at 15 to 25 percent | Worn BN56 under load | Get it tested and replaced |
| Back panel gaps or a raised screen | Swollen cell | Unplug and take it in the same day |
| Redmi 9C very warm while idle | Faulty pack, charger or cable | Change the cable, then have the phone checked |
Start with what makes a battery drain fast, since apps and weak signal explain most Redmi 9 complaints. If the trouble stays, work through the checks for battery health.
A BN56 that has puffed up, scorched, leaked or dented belongs nowhere near a charger. Unplug immediately, avoid pressing or flexing the Redmi 9A, keep it cool and bring it to Xiaomi service. BN56 knock offs often overstate capacity; take the exact code only.
Buying and fitting a replacement pack
Go to Xiaomi's authorised service or a Redmi repair shop you know well. Tell them which phone it is with its model number, and have them compare BN56 with the old sticker before they order. Another 5000 mAh code may not fit inside a Redmi 9A, so confirm BN56 before anything else.
Warning signs on a new BN56:
- It weighs noticeably less than the BN56 you took out.
- BN56 lettering looks fuzzy and the batch line is absent.
- Its sticker claims far more than a 9A sized 5000 mAh pack can hold.
Step by step fitting advice for any phone is on the page about replacing a mobile battery. Other phones in this family are listed on the full index of Redmi battery codes.
Caring for a BN56 in an entry level Redmi
Charging overnight on a bed, or in a hot room, ages the cell faster than normal use does. Keep the phone on a hard surface, take off a thick case if it feels warm, and use the adapter and cable that came with it or one rated no higher. Swap a cable whose plug gets hot.
A Redmi 9A that still shuts down low after a reboot and full charge probably has a worn BN56. Other phones with a similar cell size are gathered at 5000 mAh phones, which helps when comparing.
Frequently asked questions
What is the Redmi 9A battery model name?
Most listings give BN56, a pack of 5000 mAh typical. Because the Redmi 9A body is sealed, the code can be read on the cell sticker only after the back is opened.
Is the Redmi 9 battery model the same as the Redmi 9A?
No. The plain Redmi 9 is a separate phone and most listings give it BN54. Use the exact phone name, including the letter, when you order.
What is the Redmi 9A battery model number in mAh?
Listings show 5000 mAh typical. The minimum rating is usually a bit lower, and your own pack prints it.
Do the Redmi 9C and 9A share a battery?
Most listings say yes, both as BN56. Still, read the old sticker before you buy, since versions of a phone can differ.
Can I change the Redmi 9A battery myself?
With a sealed back, the Redmi 9A is best opened by Xiaomi service or a trusted repairer. Prying the back can damage the cell and the display.
How do I spot a fake Redmi 9A battery?
Fakes feel lighter, carry blurred print, show no batch details and show a figure far over 5000 mAh. Check the new BN56's code and weight against the original.