The BF3 battery model name, properly written B-F3, is matched by listings to the Vivo Y91, Vivo Y93 and Vivo Y95, with a listed capacity of 4030 mAh. The maker group is Vivo. People often type it as BF3 or B F3, but the printed form has a hyphen after the B.
One listing also names the Y93s and the Y91C, yet that rests on thin evidence, so treat those two as something to check. Vivo made many phones in the Y series with similar names and different packs. Before paying, read the B-F3 code on your own cell or have a technician read it.
Quick facts
Step by step
Record the phone's name and its model number
Open Settings, then About phone, and note both. If you cannot find it, type model in the Settings search bar.
Have the back opened by a technician
The Y91, Y93 and Y95 are sealed phones, so the pack is not for home opening. Ask the technician to show you the sticker once the back is off.
Read the code, capacity and connector
Look for
B-F3on the sticker, then note the mAh figure and the shape of the plug. Take a clear photo before the old pack is removed.Compare the new pack before it goes in
Put the new pack beside the old one. The code, size, plug and weight should all agree, and the print should be sharp.
Which phones use the BF3 battery model name
Code letters on a Vivo pack only tell you the maker group. For B-F3, most listings name three phones: the Vivo Y91, the Vivo Y93 and the Vivo Y95. These came out close together and are listed at about 4030 mAh, which fits the idea of a common pack.
| Phone | Status | Note |
|---|---|---|
| Vivo Y91 | Matched by listings | Listed at 4030 mAh |
| Vivo Y93 | Matched by listings | Common search: y93 battery model name |
| Vivo Y95 | Matched by listings | Read the label on the old cell |
| Vivo Y93s | Not confirmed | Named in one listing only |
| Vivo Y91C | Not confirmed | Named in one listing only |
To compare with other vivo codes, our vivo code list shows them all.
Y93 battery model name: why the answer is B-F3 and not a new code
Many readers search "y93 battery model name" and expect a code made only for that phone. Listings do not show it that way. The Y93 sits in a small family with the Y91 and the Y95, and most listings put one pack across all three. So if a shop shows you a pack for the Y91 and says it is wrong for your Y93, ask them to show the code on it.
The reverse also holds. A pack that says B-F3 is not automatically right for every phone with Y in the name. Vivo has dozens of Y phones, and each page on this site, such as the Vivo Y20 page and the Vivo Y16 page, lists its own pack. Neither of those is a B-F3 phone as far as this site knows.
A Y95 owner whose battery died by afternoon asked for a new pack "of 5000". The technician pointed out that the original label read B-F3 at about 4030 mAh. A pack with a far bigger claim would be a copy, so they fitted one with the matching code instead.
Listed capacity and what your label may say
Y91 adverts and listings quote B-F3 at 4030 mAh, and the label may add a lower rated value. For B-F3 that rated number has not been confirmed here, so read it off your own label.
B-F3's energy is its mAh times its voltage, then over a thousand, in watt hours. B-F3's voltage is unconfirmed; purely as an example, 3.85 V would give 4030 mAh about 15.5 Wh. Use your own sticker for the real value.
Screen-on time depends on brightness, signal strength, the chip and your apps. A new B-F3 usually gave a Y91 or Y93 a day of mixed use, but an older cell gives far less.
Checking B-F3 before you order
Never order B-F3 on the Y91, Y93 or Y95 name alone. A phone can have more than one hardware version, and a seller's list may be copied from another list. Use this order of checks:
- Note the model number shown in About phone or on the retail box.
- Get the back opened by a technician and read the label printed on the cell.
- See that it says
B-F3, not a near match such asB-G7orB-E5. - Request the same plug shape and a capacity near the old B-F3's.
The typing slips are common: BF3, B F3, B-F3 and even BE3 all turn up. Only the hyphenated form is how the code is printed. If the B-F3 sticker is rubbed, angle it under bright light or photograph it without flash and zoom in.
Keep the old B-F3 on hand at the counter until the replacement proves itself. If anything is off, you can compare the two again.
Failing battery signs on a Y91, Y93 or Y95
These phones are old now, so the original pack may have gone through a great many charge cycles. The table below shows what people notice first.
| What the Y93 shows | Cause behind it | What to do about B-F3 |
|---|---|---|
| Charge level drops in big jumps | Worn cell reading wrongly | Check Y93 health, then decide on a B-F3 |
| Y91 dies with 20 to 30 percent showing | B-F3 voltage dips under load | Have B-F3 tested |
| Y95 screen lifts or back gap grows | B-F3 has puffed up | Stop charging and see a technician today |
| Y93 stays warm while idle | Heavy app or faulty pack | Restart, remove the cover, then test |
First rule out apps and weak signal using the page on fast battery drain. Next, open the health check guide.
Should B-F3 swell, heat, leak or dent, it can catch fire. Unplug the Y95 at once, do not squeeze it or push on the back, and keep it from heat. Have a technician look at it the same day. B-F3 copies often print false mAh numbers, so buy only a pack printed B-F3 in full.
Fitting a replacement pack safely
The Y91, Y93 and Y95 have glued backs with B-F3 under other parts, so a home attempt risks the screen, the flex and the cell. Go to vivo service or a technician who has done this job before, and give them the model number plus B-F3.
A weak B-F3 copy shows in the details:
- It weighs noticeably less than the pack you removed.
- The B-F3 lettering smudges and lacks a batch line.
- The label claims well above 4030 mAh in the same body size.
- Its plug looks slightly different from the old B-F3.
Our swap guide covers fitting for any phone. After fitting, charge the Y95 fully once and check that it stays cool.
Look-alike codes and phones people mix up with B-F3
Vivo codes are short, so a mistake of one character is easy. The pages for B-G7 and B-E5 each give their own phones. Do not swap packs because the capacity looks close, since the plug or the size can still differ.
Other phones in the Y series with a similar number, such as the Y90 or Y91i, are not confirmed as B-F3 phones here. Read their label instead of guessing from the name.
Care matters too. Charge the Y93 away from beds and hot cars, using its boxed adapter or an equal one.
Frequently asked questions
Which phone uses the BF3 battery model name?
Listings match B-F3 to the Vivo Y91, Vivo Y93 and Vivo Y95, with a listed capacity of 4030 mAh. Only one listing names the Y93s and Y91C, so check their labels.
Which battery code does the vivo Y93 use?
Most listings give B-F3 for the Y93, shared with the Y91 and Y95. Confirm it by reading the label on your own battery.
How many mAh is a B-F3 battery?
Listings give 4030 mAh. Expect a slightly lower rated figure on B-F3.
Is BF3 the same as B-F3?
People type it both ways, but the printed code has a hyphen. Always compare the full code on the label with the one on the new pack.
Can I use a B-G7 pack in place of B-F3?
Do not assume that. B-F1 and B-F5 are different codes for different phones. Match the code and plug shape, not only the mAh.
What gives away a fake B-F3?
Fakes tend to weigh less, have smudged print, lack batch details and claim far more than 4030 mAh. Compare weight and B-F3 code with the old cell.