The Vivo Y73 battery model name is listed as B-N8, a pack of 4000 mAh typical capacity. Many people type it as BN8 or B N8, yet the written form of a Vivo code includes a dash after the first letter. This code appears in only one parts listing, so treat it as a good pointer and not as final proof. Compare it with the print on your own pack before you place any order.
The Vivo Y73 covered here is the phone with model number V2059. Vivo also sold a Y73s, and other Y73 phones in other countries, so the name alone is not enough. The code is printed on the cell's own label, and a technician can read it only after the back of the phone is opened.
Quick facts
Step by step
Write down the phone model number
Open Settings and tap About phone. If you cannot find the model number, type model in the Settings search bar. It should read V2059 for this phone.
Check the box or the invoice
The box label carries the same model number. A photo of it on your phone saves a second trip to the shop.
Ask for the old battery to be read first
With the back open, the technician reads the code on the label. It should say
B-N8if the listing is right for your unit.Compare old and new packs side by side
Look at the code, capacity, connector shape, size and weight. Do not fit a pack that differs in any of these.
Vivo Y73 battery model name: which phone uses B-N8
Packs from Vivo and iQOO use a short code. It starts with the letter B, followed by a hyphen and then two further characters. This kind of code tells you the maker family, not the exact handset. In the listing checked for the Y73, the code is B-N8 and only the Y73 is named, so no sister phone is confirmed here.
| Phone | Code | Status |
|---|---|---|
| Vivo Y73 (V2059) | B-N8 | Listed, 4000 mAh typical; confirm on the label |
| Vivo Y73s | Not confirmed | A different phone; do not assume the same pack |
| Y73 sold abroad | Not confirmed | Other markets may use other versions |
That listing also showed a few other model numbers beside V2059. Those could be regional versions, but they are unverified, so only the Indian V2059 is placed in the fits list.
How many mAh the Y73 pack holds
Adverts and spare part listings usually quote 4000 mAh. Many Vivo packs show a rated value slightly below that, and the rated value for this phone is unconfirmed. The label on your own pack gives the final answer.
To compare packs by stored energy, multiply mAh by the cell voltage, then move the decimal three places to get watt hours. As an example only, 4000 mAh at 3.85 V comes to near 15.4 Wh. The voltage on your pack may differ a little.
How long the phone lasts with the screen on is decided by the display, network strength, brightness and which apps stay busy, not by mAh alone. A battery of this class normally gets through a day of mixed use, but a bright screen and weak network will cut that short.
Where to read the code on your Y73
On this sealed phone, you cannot see the code from the outside. The Settings screen shows the phone model number, and the battery page under Settings then Battery shows usage, but neither gives the pack code. The code is printed on the label stuck to the cell.
- Box or invoice: shows the phone model number, and no pack code.
- Old battery label: shows the code, capacity and batch details.
- Parts listing at a service centre: shows the code against your model number.
For other routes to a code, see the guide on finding any battery model name.
Before the worn pack is thrown away, click a quick picture of its old label with your phone. That image can end any argument later.
Look-alike names that mislead Y73 buyers
The biggest trap is the typing habit. A search for BN8 can lead to the Redmi code listed at BN8, which belongs to a different maker and a different phone. The Vivo code has a dash: B-N8.
- Y73 and Y73s sound alike but are separate phones.
- Other Vivo Y phones, such as the Vivo Y20 and the Vivo Y21, have their own codes and pages.
- Equal mAh with a different code may still not suit the connector.
The full list of Vivo and iQOO codes is on the Vivo battery model list.
A customer asked for a "bn8 battery for Y73" and was shown a Redmi pack with a similar code. The technician placed it beside the worn Vivo pack, saw the different connector, and asked for the one marked B-N8.
Signs your Y73 battery is ageing
| What you see | Why it happens | Next step |
|---|---|---|
| Percentage drops quickly | Worn cell or heavy apps | Check usage in Settings, then test the pack |
| Sudden switch off with charge left | Weak cell under load | Get the battery tested |
| Screen lifts or back gap appears | Swollen cell | Leave it unplugged and visit a service centre |
| Phone gets hot while idle | Faulty pack or background app | Switch it off and on again, remove the back panel, and get the phone checked |
Rule out apps and signal first, as explained in why a battery drains fast. Then use the health check steps.
Is the cell swollen, very hot, leaking or dented? Then it can be a fire risk. Unplug the Y73 immediately. Do not squeeze or prick the cell. Shield the Y73 from sunlight and open flame, then hand it over at a service desk. Cheap duplicates often show mAh figures that are too high, so buy a replacement only if its code is exactly the same as the code on your old battery.
Replacing the Y73 battery without a mix-up
This phone has a sealed back panel, so do not try to open it at home. Visit a vivo authorised service centre or a repairer with a good local reputation. Tell the staff the V2059 model number and the battery code.
Inspect the new pack before the technician fits it:
- Print is sharp and shows the code B-N8 with batch details.
- Weight and thickness are close to the old pack.
- Its B-N8 label stays close to 4000 mAh. A cell of this size cannot honestly hold much more.
More fitting tips sit in our swap guide.
Charging habits that keep the pack healthy
The Y73 supports fast charging, but heat is what hurts the cell most. Charge on a hard, cool surface, remove a bulky cover when the phone feels warm, and avoid long games while it charges.
Charge the Y73 using the adapter from its box, or another with the same output. If a cable gets warm near the plug, discard it. Hours spent sitting at 100 percent age the B-N8 faster, so unplug the Y73 near full when you can. Picture a Y73 dying at 40 percent despite a full charge and a fresh restart. In that case the cell is likely weak and needs a proper test.
Frequently asked questions
What battery code does the vivo Y73 use?
Most listings give B-N8 for the Vivo Y73, V2059, at 4000 mAh typical. Confirm it from the print on your own battery.
Is BN8 the same as B-N8?
People type B-N8 as BN8, but a Vivo pack is written B-N8. A plain BN8 code points to a Redmi battery on this site, so do not order by the unhyphenated form alone.
How many mAh is the Y73 battery?
The listing states 4000 mAh as the typical value. Many packs carry a little lower rated (minimum) figure. The print on your own B-N8 settles it.
Can I put a Vivo Y73s battery in the Y73?
Do not assume it. They are two different phones, and the Y73s pack code is not confirmed here. Match the code and connector.
Can I change the Y73 battery at home?
It is better not to. The back is sealed and a wrong move can damage the cell. Use an authorised service centre or a dependable repair shop.