The BW1 battery model name, written B-W1 on the pack, is matched by most listings to the Vivo Y16, Vivo Y02 and Vivo Y02s. The same code family covers iQOO phones too, but nothing here ties B-W1 to an iQOO model.
People type it in many ways: "vivo bw1", "vivo b w1" or "b-w1". All four mean the same pack. Only a handful of sources mention B-W1, so treat the phones below as a strong lead and read your own cell before paying.
Quick facts
Step by step
Read the exact phone name and model number
Open Settings, tap About phone and note the name and model number. If you cannot find it, type model in the Settings search bar.
Get the old cell label read by a technician
The code
B-W1is stamped on the label of the cell inside. Sealed phones need a careful opening, so leave this to the repair counter.Compare code, mAh and connector
Hold the new pack beside the one you removed. The code should read the same, the mAh should be close and the flat connector end should look identical.
Judge weight and print before fitting
Hold both packs in your hand. A pack that feels much lighter, with smudged letters and no batch mark, should go back.
Which phones use the BW1 battery model name
vivo prints compact codes: B, a hyphen, then a letter and digit. Such a format names the vivo group and nothing more. For B-W1, the phones named in most listings are three budget Vivo models. The Y16, Y02 and Y02s are all 5000 mAh class budget phones, so a shared B-W1 is believable.
| vivo Y handset | Status | Note |
|---|---|---|
| Vivo Y16 | Named by most B-W1 listings | Also has its own Vivo Y16 battery page |
| Vivo Y02 | Most B-W1 sellers list it | Check the old B-W1 label |
| Vivo Y02s | Listed for the Y16 by most sellers | Check the B-W1 print on the old cell |
Use the model number from your own About phone screen when you order, not a number copied from a listing.
Same series name, different battery
Vivo sold many Y-series phones with near-identical names, and a repair counter can easily mix them up. The Y02 and the Y02s are two phones, and some Y-series phones with a similar name use another code. Do not assume a pack fits because the name sounds close.
One customer brought in a Y series phone asking for a "Y35 battery". With the back off, the technician found another code on the old cell and declined the B-W1 on the shelf. The phone name on the box had matched, but the sticker had not.
The rule is simple: the phone name gets you to a short list, and the sticker inside decides the final choice.
Rated and typical mAh for this pack
The figure of 5000 mAh comes from listings and is the typical value, the one used when phones are advertised. vivo cells often print a rated value a little under 5000 mAh. Read that number on your own pack, because it can differ between batches.
At a typical 3.87 V, a 5000 mAh B-W1 stores roughly 19.4 Wh. A voltage for B-W1 is not confirmed here, so a watt hour figure is left out. If your sticker shows a voltage, use it for your own sum. Two packs of equal mAh and unequal voltage do not store the same energy.
A Y16, Y02 and Y02s with the same B-W1 can still differ in screen time because of chip, display, signal and apps.
Look-alike Vivo codes to keep apart
Vivo codes share a pattern, so a quick glance at the counter can go wrong. Letters such as W, V and N look similar in worn print, and 1 can pass for I.
- B-Y1 ends in the same digit but has its own phone list.
- B-G7 is another common Vivo pack, with different phones.
- B-O5 is often typed with a zero, just as B-W1 is typed without the hyphen.
Never judge by capacity alone. All the Vivo and iQOO codes sit together on the Vivo battery list.
Signs your pack is wearing out
| Y16 sign | Why it happens | B-W1 step |
|---|---|---|
| Charge drops quickly in a few hours | B-W1 has lost capacity with age | Check Y16 health, then plan a B-W1 |
| Y16 powers off while still showing charge | Weak cell cannot give a burst of current | Book a slot at a service centre |
| Y16 back panel or screen edge starts to lift | Swollen cell | Stop charging, get it checked the same day |
| Handset stays warm when idle | A busy app or worn B-W1 | Reboot, take off the case, have the B-W1 tested |
Fast drain on a Y16 is often apps or poor signal, so read our drain troubleshooting guide first. Then run the battery health check before spending on a B-W1.
A B-W1 that bulges, overheats, leaks or dents is a fire hazard. Disconnect the Y16, leave the pack alone and get it somewhere cool. Hand the phone over to a service centre. B-W1 copies with inflated labels circulate widely, so only accept an exact code match.
Getting a B-W1 fitted safely
These Vivo phones are sealed, so the back must be lifted with the right tools. Do not try it at home. Visit vivo service or a well regarded workshop with the exact model number from About phone.
- Weight of the new pack should be near the old one.
- B-W1 print should be crisp with batch marks.
- A claim far above 5000 mAh is a red flag, because the pack is of the same size.
More fitting advice for any phone can be found under mobile battery replacement.
Ask the repairer to show you the old B-W1 sticker and photograph it. You then hold the code if you need to order again.
Everyday care for a 5000 mAh entry phone
Phones like the Y02 and Y16 are often charged overnight, and that habit combined with heat wears a pack quickly. Charge the Y16 on a firm, open surface rather than a bed, and remove a heavy case if it warms.
The Y16 ships with a 10 W charger, gentle enough for B-W1 to charge overnight. Avoid leaving the Y16 sitting at 100 percent for hours. Shut downs at 20 percent on a Y16 after a full charge call for a test of the B-W1 first.
Frequently asked questions
Which phone uses the BW1 battery model name?
Most listings match B-W1 to the Vivo Y16, Y02 and Y02s, with 5000 mAh typical capacity. Check the B-W1 print on your old cell.
Is B-W1 the Vivo Y16 battery?
Most sellers pair it with the vivo Y16. The Vivo Y16 also has its own page on this site, and the label inside your phone is the final check.
How many mAh is the vivo bw1 battery?
It is given as 5000 mAh typical. Your B-W1 may also print a slightly lower rated figure.
Is vivo b w1 the same as BW1?
Yes. People drop the hyphen or add a space, but the written form on the label is B-W1.
Can I fit a B-Y1 pack in place of B-W1?
Do not take that for granted. The two codes have different phone lists, and the connector or size may differ.
How do I spot a fake B-W1?
Compare with the old pack.