The BLPB21 battery model name, sometimes searched as blpb21 battery model, is listed by a parts seller for the Realme Note 60 and Note 60x, at 4850 mAh and 3.91 V, about 19 Wh. Realme advertises these phones with 5000 mAh, so 4850 mAh fits the minimum line on the label.
Only one seller makes this match, and we found no link between BLPB21 and any OnePlus phone despite the BLP prefix the brands share. Treat the Note 60 match as likely, and check the label before ordering.
Quick facts
Where the BLPB21 battery model name comes from
Realme, Oppo and OnePlus number their packs with BLP plus digits. When the plain numbers ran out, newer packs gained a letter: BLPA for one wave, then BLPB. BLPB21 belongs to that newer wave, so it sits in recent budget phones like the Note 60, alongside packs such as BLPB61 in the Realme C75.
BLPB21 battery model name and nearby codes
Codes in the B series are close together: BLPB21, BLPB33 in a Realme GT model and BLPB61 in the Realme C75. Each is its own pack with its own outline and connector. If a seller suggests that "any BLPB battery" will do, choose another seller, because a wrong pack can strain the connector or sit loose inside the frame.
Realme Note 60 and Note 60x
The Note series is Realme's entry range, and the Note 60 and 60x share a body and battery. Both were launched first outside India, so in India you are more likely to meet them as imports or under another name. If your phone's About phone screen shows Note 60 or Note 60x, BLPB21 is the code to look for on the cell.
Confirming the code yourself
| Check | Where | What you want |
|---|---|---|
| Phone model | About phone in Settings | Note 60 or Note 60x |
| Battery code | Cell label under the back | BLPB21 |
| Capacity line | Same label | About 4850 to 5000 mAh |
| Voltage | Same label | 3.91 V |
Because BLPB21 is a newer code, few genuine replacements are on the market yet. A pack with a smudged code and an inflated capacity is more likely to be a copy that heats up. Wait for a proper part rather than fitting a doubtful one.
Energy and charging
At 3.91 V, 4850 mAh holds about 19 Wh, almost the same as a 5000 mAh cell at a lower voltage. Budget Realme phones like the Note 60 charge at modest speeds, so a full charge takes a couple of hours. Should a Note 60 suddenly fill much quicker after a swap, suspect a smaller cell than the label admits.
When the battery needs attention
A new phone rarely needs a battery. If a Note 60 drains fast in its first year, check apps and settings with our fast drain guide and claim warranty service if the battery is genuinely at fault. Other Realme codes are on the Realme, Oppo and OnePlus index.
Checking a new Realme phone's battery health
Inside Realme's battery menu you can rank apps by drain and switch on a smart charging mode that eases off near full while you sleep. Searching Settings for the word battery opens that menu directly. On a phone this new, battery complaints are usually solved by closing a misbehaving app or reducing brightness. A Note 60 that dies at 30 percent within its first year belongs back at a Realme service desk under warranty, not in a roadside shop with an aftermarket BLPB21.
Frequently asked questions
Which phone uses the BLPB21 battery?
One seller lists it for the Realme Note 60 and Note 60x.
What is BLPB21 battery capacity?
4850 mAh at 3.91 V on the listing, which fits the 5000 mAh Realme advertises.
Is BLPB21 a OnePlus battery?
We found no OnePlus phone using it. It appears only in Realme listings.
What does the B in BLPB21 mean?
It marks a newer series of BLP codes, after the BLPA series.