The Redmi Note 7 battery model name is BN4A, and it is listed at 4000 mAh typical. Most listings give the same code for the Redmi Note 7 Pro, so the two phones appear to share one battery. The letters BN point to Xiaomi, the maker behind both Redmi and POCO.
People type this as "note 7 battery model" or "mi note 7 battery model name". Your handset belongs to the Redmi line, so search with the exact name printed on your box. The code sits on the cell sticker, which means a technician must open the back before anyone can read it.
Quick facts
Step by step
Write down the exact phone name
Open Settings, tap About phone and note the device name. If you cannot find it, type about in the Settings search bar. Check whether it says Note 7 or Note 7 Pro, and keep the box if you still have it.
Ask for the old label to be read
With the back open, the sticker shows
BN4Aalong with capacity and voltage. Ask the technician to read it out or show it to you. Do not pull the pack out yourself.Compare the new pack with the old one
Put the two packs side by side. The code should match, the size should look the same and the connector end should have the same shape and position.
Judge the print and weight
Good print is sharp and carries batch details. A pack that feels much lighter than the old one, yet claims a bigger mAh, is a copy.
Where to see the code on your Note 7
The body of the Redmi Note 7 is sealed and has a glass panel at the back. The battery code is not visible from outside. There are three ways to find it.
- Battery sticker: the surest place, but only with the back open. Leave this to a technician.
- Box and invoice: these give the phone name and model number, which a parts seller or technician uses to find the pack.
- Settings: About phone gives the phone name and model number. It does not usually show the battery code, so do not expect to find it there.
Brand menus change with software version. If the menu names are not the same on your handset, type battery or about in the Settings search bar.
Take a clear photo of the worn-out sticker while the back is still open. The code, capacity and batch lines will help you if the new pack needs to be compared later.
Rated and typical capacity of the Note 7 battery
The number you see in adverts and parts listings is 4000 mAh, a typical value. Many Xiaomi packs also carry a lower minimum (rated) figure on the sticker. Nothing here confirms that rated number for BN4A, so read the printed label on your own battery rather than trusting a listing.
Never rate a new pack by mAh alone. A pack claiming 5000 or 6000 mAh for this phone is not honest, because the space inside the body is fixed. Real use also depends on display, network strength, brightness and the apps running, so two Note 7 phones with the same pack can give different screen-on time. An older pack will give less than it did when new, even when the label is unchanged.
Note 7 or Note 7 Pro: how to avoid a wrong order
Searches such as "note 7 pro battery model name" and "redmi note 7 pro battery model name" lead to the same code in most listings. The risk is not between these two phones. The risk is that look-alike names get mixed: Note 7, Note 7S, Note 7 Pro, and the later Note 8. Each name belongs to a different phone, and a pack sold for a later phone may look close in size.
A customer came in with a cracked Note 7 and asked for a Note 8 pack because both had four thousand on the box. The technician opened the back, read BN4A on the worn label and turned down that pack. The connector end and the shape did not match.
The newer phone is explained separately in Redmi Note 8 battery. Open it only to compare, not to order for a Note 7.
Signs the Note 7 battery is worn out
| Symptom | Likely reason | Action |
|---|---|---|
| Charge drops quickly | Many years of use and cycles | Follow the health steps, then book a replacement |
| Phone dies while showing some charge | Tired cell that cannot deliver sudden power demand | Ask a service counter to test it |
| Screen lifts from the body | Swollen cell pushing from inside | Stop using the charger today |
| Very hot while unused | Faulty pack or a runaway app | Switch off, take the case away, then have it inspected |
The Note 7 is an older phone, so a worn battery is common. Before blaming the pack, read the causes of fast battery drain, since heavy apps and weak signal can explain much of the loss. Then follow the steps in checking battery health.
A bulging, hot, leaking or damaged battery can burn. Disconnect the charger, never press or pierce the pack, store the handset well clear of any heat source and have a technician examine it the same day. Copies carrying inflated capacity claims are common, so accept only a replacement whose printed code is BN4A.
Fitting a new BN4A pack
The Note 7 is not made for easy home repair. The back is glass and held with adhesive, and the pack sits under other parts. A badly done job can crack the back or damage the cable. Go to an authorised service point or a mobile technician with a good name in your area.
Tell them your phone name, Note 7 or Note 7 Pro, and request a match of BN4A to the old sticker. Then inspect the new pack:
- The code is printed clearly with capacity and batch details.
- It weighs about the same as the worn one.
- The connector is the same shape and sits in the same place.
You can read more about the steps on the battery replacement page. After fitting the fresh battery, charge it fully once. Then keep an eye on the phone over the next few days. If the phone turns warm while it is just sitting idle, something is wrong with the new battery.
Looking after an older Note 7 pack
An older pack ages faster in heat. Avoid charging the handset on a mattress or in direct sunlight, and remove a tight case if the phone feels warm during charging. Use the charger and cable that suit the phone, and replace any cable that heats at the plug end.
Keeping the phone at full charge for long hours also wears the cell. Unplug it when it is full, if that is easy for you. Charging time depends on the charger watts, so a slower charger is not always a fault. If the phone still cuts out early after a reboot and one full charge, ask for a battery test.
Frequently asked questions
What is the Redmi Note 7 battery model name?
It is BN4A, sold as a 4000 mAh typical pack. Ask for the label on your worn cell to be read, because the code is printed only there.
Is the Note 7 Pro battery model name the same?
Most listings give BN4A for the Note 7 Pro too. Ask the technician to match the code on the old label before fitting.
Is there a Mi Note 7 battery model name?
The phone is a Redmi, so search for the Redmi Note 7. Use the exact name on the box, because a phone with a similar name can have a different pack.
How many mAh is the Redmi Note 7 battery?
Xiaomi lists this phone at 4000 mAh typical. Your Note 7's cell may print a rated value just under 4000 mAh, so check the BN4A sticker you actually have before ordering.
Can I fit a Note 8 battery in my Note 7?
No. Two batteries with a similar mAh value may not fit the same phone. The code must be exactly right, and the plug must be the same shape as well.
How do I spot a fake Note 7 battery?
A fake feels light, has dull print and no batch details, and claims far more than 4000 mAh. Hold it next to the old cell and compare.