The B-G7 battery model name is the one that listings give for the Vivo Y12, and the same pack is listed for the Vivo Y15, Y17 and Y11 as well. Listings describe B-G7 as a 5000 mAh typical vivo pack at 3.85 V. People often type it as BG7 or B-G7, and both mean the same code.
If you came here by searching "vivo y12 battery model name", the short answer is B-G7. Some listings also name the Vivo Y3 and the Z5x, but those two are not sold widely in India, so treat them as a doubt and not as a promise. Read the code on your own pack before you pay for a new one.
Quick facts
Step by step
Write down the exact phone name
Open Settings, tap About phone and note the phone name. If the page looks different on your phone, type model in the Settings search bar.
Look for any letter after the number
Y12, Y12s and Y12i are different phones. Check whether your phone name has a trailing letter, because a letter can mean a different pack.
Get the old sticker read at the repair counter
On a sealed phone, only a technician can reach the cell. The sticker should show
B-G7along with the capacity and voltage.Compare the new pack with the old one
Put both packs side by side. Code, size, connector and weight should all be close. Reject a pack that is clearly lighter.
Phones that use the B-G7 battery model name
The code begins with B and a hyphen, the pattern Vivo uses for its packs. The pattern only tells you the maker group. Spare part sellers agree on the Y12, Y15, Y17 and Y11 group, which forms the fit list below. All of them are listed with a 5000 mAh class battery, so one common pack is plausible, but your own label has the final word.
| vivo handset | Status | Note |
|---|---|---|
| Vivo Y12 | Listed | Most searched phone for this code |
| Vivo Y15 | Listed | Read your old sticker to be sure |
| Vivo Y17 | Listed | Read your old sticker to be sure |
| Vivo Y11 | Listed | Only the older Y11 of this family, not a later phone with the same name |
| Vivo Y3, Vivo Z5x | Seen in one listing | Not common in India, so check before ordering |
Every vivo code is gathered on the vivo battery model list, the easiest place to compare B-G7 with its neighbours.
Y12 battery model: why the exact phone name matters
vivo names many Y phones that differ by one letter. The Y12 battery model is B-G7, but the Y12s and Y12i are separate phones, and nothing here confirms that they take the same pack. The same care applies to the Y15 and Y17 names. A letter after the number is a signal to stop and read the label.
The model number on the retail box or in About phone is more reliable than the marketing name. Ask the technician to match that model number with the code on the old cell.
A customer brought a Y12 with a dead battery and asked for a "Y series 5000 mAh pack". The counter had a pack with the same capacity but another code. The technician opened the back, saw B-G7 on the old cell and refused the substitute. Same mAh did not mean same fit.
Rated and typical figures for B-G7
The 5000 mAh quoted for B-G7 is the typical figure from vivo's adverts and parts sellers. The sticker on a pack often prints a slightly lower minimum, called the rated capacity. No rated B-G7 figure is confirmed here, so read it from your Y12 or Y15 cell.
At 3.85 V, a 5000 mAh B-G7 holds about 19.25 Wh. At the listed 3.85 V, a 5000 mAh pack holds about 19.3 Wh. That is a useful way to compare two packs, because a pack with equal mAh and a lower voltage stores less energy.
Screen, signal, brightness and apps decide endurance, so two Y phones sharing B-G7 can still differ. For a wider look at what the number means, see 5000 mAh phones.
How to confirm B-G7 before you buy a replacement
Do not order on the strength of the phone name alone. Many Y-series phones look alike from the front, and their packs are close in shape. Use this order of checks, which takes only a few minutes at the repair counter.
- Match the Y-series name and the model number shown in settings or on the box.
- Have the old cell sticker read once the back panel is open.
- Compare the new pack code letter by letter, including the hyphen and the G.
- Check that the connector and size match the pack you are removing.
Ask the technician to let you snap the old cell sticker with your camera before the pack is removed. That way a wrong first pack does not mean opening the Y12 twice.
New to decoding stickers? Our sticker decoding walkthrough covers vivo labels and other brands.
Signs the battery is ageing
| Y12 symptom | Likely reason | What to do |
|---|---|---|
| Y12 halves its charge within a few hours | Worn cell after long use | Test the pack, then budget for a B-G7 |
| Phone turns off while showing 15 to 30 percent | Cell cannot give peak current | Ask a vivo service desk to test it |
| Back panel gaps or a bulging screen | Swollen cell | Stop using the charger and get help that day |
| Y12 warm while resting | A heavy app or worn B-G7 | Restart, remove the cover, then have it checked |
Apps and weak signal drain Y phones too, so start with the fast battery drain page. Next, the battery health check helps you judge the B-G7 itself.
Any B-G7 that has swollen, overheated, leaked or been dented could catch fire. Unplug the Y12, leave the bulge alone and keep the phone clear of heat. Cheap copies often print a false capacity, so buy a pack only if its code reads exactly B-G7.
Replacing B-G7 the safe way
These phones have a closed body held with adhesive and clips, so opening one at home can damage the back panel or the cell. Let vivo service or a trusted technician fit it, and give them the Y-series name, model number and B-G7.
A weak B-G7 copy gives itself away once it is in your palm:
- It is clearly lighter than the Y12's original cell.
- The B-G7 print is smeared and batch marks are missing.
- Its sticker promises far beyond 5000 mAh in a Y12 sized pack. No honest Y12 sized cell can hold that.
General fitting advice for every phone is in mobile battery replacement.
Look-alike Vivo codes people confuse with B-G7
Vivo codes all share the same shape: B, a hyphen and two characters. That makes them easy to misread, especially when the print is worn. G can look like C or 6, and 7 can look like 1. Tilt the sticker under a bright light before you decide.
- B-O5 is a different code with its own page and phones.
- B-Z5 and B-W1 are also separate packs. Do not swap them by guess.
- A pack for a newer Y phone, such as the one on the Vivo Y20 page, is a different battery even if the capacity looks close.
When two codes differ by one character, treat them as two different packs until the label says otherwise.
Daily care for a 5000 mAh Y-series pack
Budget Vivo phones often stay plugged in overnight, and that habit with heat is what ages the cell fastest. Charge the Y12 on a hard, cool surface and remove a thick cover if it warms.
Use the Y12's own adapter and lead, or a good unit rated the same. Bin any cable that grows warm near the plug. Avoid leaving the phone in a parked car or in direct sun. When a Y12 keeps shutting off at half charge despite a reboot and a full charge, the B-G7 is probably weak and worth a service centre test.
Frequently asked questions
Which phone uses the bg7 battery model name?
Listings match B-G7 to the Vivo Y12, Y15, Y17 and Y11. Sellers give B-G7 as 5000 mAh typical at 3.85 V. Confirm the code on your old pack before buying.
What is the Vivo Y12 battery model name?
Listings give B-G7 for the Vivo Y12. People also type it as BG7. With the back off, a technician reads the B-G7 sticker to confirm it.
What capacity is the Y12's B-G7?
Listings rate the Y12's B-G7 at 5000 mAh typical. Your Y12 cell's minimum line may read a little lower, so check it.
Can I use any 5000 mAh Vivo battery in my Y12?
No. Matching mAh does not guarantee a matching fit. The code, size and connector must match, so look for B-G7 on the new pack.
Is the Y12s battery the same as the Y12?
Do not assume so. The Y12s is a different phone, and its pack code is not confirmed here. Read the label of the pack in your phone.
How can I tell a fake B-G7 battery?
Fake B-G7 packs are lighter, smudged, lack batch details and overclaim capacity. Check weight and code against the Y12's old pack.