The BS7 battery model name, printed as B-S7 on the pack, is a Vivo code that most listings match to the Vivo Y01 and Y15s. The Y01 and Y15s are budget vivo phones with a large B-S7 of about 5000 mAh typical. The maker group is Vivo, and people also type the code as BS7, B S7 or vivo bs7 battery.
Use the B-S7 phone list as a strong lead rather than the last word. Only one listing was found for this code, and it gives a bigger capacity than the phone adverts do, so the figure needs a check. Some sellers add the vivo Y16 and Y10, unconfirmed, so check those on the label. The B-S7 sticker is the sure proof, and a technician has to open the sealed back before anyone can read B-S7.
Quick facts
Step by step
Note your phone's exact name and its model number
Open Settings, tap About phone and note the name and model number. If you cannot find the number, type model in the Settings search bar.
Have the old pack read after the back is opened
Ask the technician to show you the sticker. A B-S7 pack carries the code with the capacity and batch details. Do not pry the pack out yourself.
Compare the connector and shape
Put the new pack beside the old one. The outline, the thickness and the connector end must look the same, because a pack of equal mAh with another code can fail to fit.
Inspect the print and the weight
Good packs have crisp text and batch marks. If the new pack is much lighter than the old one, or claims far more mAh, send it back.
Which phones use the BS7 battery model name
vivo prints short codes as B, a hyphen and two characters, so the label says B-S7 even when buyers type BS7. The letters tell you the maker group only. For this code, most listings name the Vivo Y01 and Y15s. Both are close budget phones with a similar large pack, which makes a shared battery believable.
| vivo Y model | Status | Note |
|---|---|---|
| Vivo Y01 | Listing match | Large pack, about 5000 mAh typical |
| Vivo Y15s | Listing match | Confirm on the sticker |
| Vivo Y16 | Not confirmed | Some lists add it, so read the label before ordering |
| Vivo Y10 | Not confirmed | Sold in several versions; check the label |
| Vivo Y20, Y21 | Not in the listing | Check the label, do not assume a match |
The Y16 has its own write-up on the Vivo Y16 battery page. For every Vivo and iQOO code in one place, use the Vivo battery list.
What the 5000 mAh and 5500 mAh numbers mean
The phones in this list are sold with a pack of about 5000 mAh typical. That is the figure in Y01 adverts. The B-S7 sticker may carry a slightly smaller rated value, which is the figure to trust for your unit.
One spare listing shows B-S7 at 5500 mAh. That beats the Y15s's own advertised figure, and no cell this size can hold much more than the original. Read such a claim as a marketing number, not a gain in battery life.
Work out B-S7 energy by multiplying its mAh by its volts and dividing by a thousand. B-S7's voltage is unconfirmed, so read it from the sticker. Comparable vivo cells run near 3.8 V, roughly 19 Wh for B-S7, though your sticker has the final word.
Confirming B-S7 before you pay
Never order B-S7 on the Y01 or Y15s name alone. Vivo sold several Y models with near-identical names, and some came in versions with different batteries. Follow the steps above, and keep the model number in your notes next to the code.
One Y01 owner arrived with a dead cell asking for "S something", because the sticker was half rubbed off. The counter had B-S1 and B-S7 packs on the shelf. The technician held the old pack under a lamp, read the last character as 7, and only then opened the new box. Had he gone by the first two characters, the wrong pack would have been fitted.
Photograph the B-S7 sticker the moment the Y15s is open. If the print is faint, a photo with the torch on shows the last character far better than your eyes.
Look-alike Vivo codes that get confused with B-S7
The second character is where mix-ups happen. S and 5, 7 and 1 can look the same on a worn sticker. Several nearby codes belong to other phones, so check each page for its own list.
- B-S1 and B-S2 share the first two characters but are separate packs.
- B-T7 shares the last character and is easy to misread.
- Phones with the same size and a similar name, such as the Y20 or Y21, are not proven to share this code.
When two codes seem alike, ask for the full code as printed, not a guess from memory.
Signs that the pack is wearing out
| Y01 symptom | Likely reason | Next move |
|---|---|---|
| Y01 drops half its charge within hours | Worn B-S7, or a heavy app | Close extra apps, then test health |
| Y15s blacks out at 15 to 30 percent | Cell cannot supply peak current | Get the pack tested |
| Y01 screen lifts or back gaps open | B-S7 has swollen | Stop charging, go to service the same day |
| Phone stays warm on standby | Faulty pack or charging fault | Take off the case, try another cable, have it checked |
Before blaming B-S7, read our page on quick drain, since signal and apps cause the same symptom on a Y01. Then run the battery health check and see whether the capacity has really fallen.
A B-S7 that swells, runs hot, leaks or dents may ignite. Disconnect the Y15s, keep from bending it and move it somewhere cool. Inflated B-S7 copies are everywhere; accept only one printed B-S7 that weighs close to the original.
Fitting a new B-S7 pack the safe way
The Y01 and Y15s are sealed, so a blade at home is the wrong tool. Book it at the brand's authorised centre or with a repair person who opens phones every day. Give them the Y01 or Y15s model number and your photo of the B-S7 sticker.
A genuine-looking pack usually has these marks:
- Sharp print with the code, capacity and batch details.
- A weight near that of your old pack.
- A capacity near the original, not far above it.
After fitting B-S7, charge the Y01 to full once and check it for heat. Advice that applies to every phone sits on the battery replacement page.
Daily care for B-S7
A pack near 5000 mAh lasts a long time in light use, but heat shortens its life. Do not charge the phone in sun, on a bed or inside a thick cover. Charge the Y15s from its 10 W boxed adapter or an equal one, and throw out a lead that warms at the connector.
Keeping the phone on charge at full for hours every night also adds wear. Unplug the Y01 once it is full if you can. How long a Y01 lasts rests on brightness, reception and apps, so mAh alone says little about B-S7.
Frequently asked questions
Which phones use the BS7 battery model name?
Most listings link B-S7 to the vivo Y01 and Y15s. Some lists add the Y16 and Y10, which is not confirmed. The label on your own cell is the final proof, so have it read before you order.
Is B-S7 the Vivo Y16 battery model?
Not confirmed. Some lists name the Y16, but listings disagree. See the Y16 page, and have that phone's cell code read once its back is open.
What capacity does B-S7 have?
These phones are sold at about 5000 mAh typical. One listing shows 5500 mAh, which looks inflated. Take the rated value from your own sticker.
Is BS7 the same as B-S7?
Yes. The label has a hyphen, and people drop it when typing. Both mean the same Vivo code.
Can I fit a B-S1 or B-S2 pack in place of B-S7?
Not safely. One character separates them and they may suit other phones. Compare the full B-S7 code and the plug shape.
What gives away a fake B-S7?
A counterfeit B-S7 is light, its print is fuzzy, it has no batch marks and it promises over 5000 mAh. Check weight and print against the Y01's first cell.