The Realme C33 battery model is BLP877 according to most replacement listings, a 5000 mAh pack that the same sellers also list for the Realme C31, C35 and 8i. Realme advertises the C33 with 5000 mAh and 10 W charging, which fits that pack.
Realme has not published its parts list, so we treat BLP877 as the strong majority answer and not a maker statement. The phone's own model number, RMX3624, is what to quote at the service desk.
Quick facts
Realme C33 battery model: the BLP877 family
Sellers in India and abroad list BLP877 for a group of Realme phones built around the same 5000 mAh pack. The BLP877 page has the full code story.
| Phone | Model number |
|---|---|
| Realme C33 | RMX3624 |
| Realme C31 | RMX3501 |
| Realme C35 | RMX3511 |
| Realme 8i | RMX3151 |
Do not use a Realme 10 or Realme 5 pack
Two other codes turn up next to C33 searches. BLP957 is listed for the Realme 10, and BLP729 for the Realme 5, C11 and C21 family. Both are 5000 mAh, but neither is confirmed for the C33 body. Matching capacity alone is not enough.
Confirming BLP877 in your C33
Open Settings, then About phone to see RMX3624. A refreshed C33 sold later carries a different RMX number, so read yours rather than assume. The pack code itself is on the cell sticker, visible once a technician lifts the back.
Cheap BLP877 copies are common because the pack fits several popular phones. If the replacement feels lighter than the old cell or the print looks blurred, do not fit it; a weak copy can heat and swell.
How long a C33 should last on one charge
With an efficient budget chip and an HD screen, a healthy C33 usually gets through a full day of calls, chat and some video. Charging at 10 W takes well over two hours from empty. If yours now needs charging twice a day, check apps first with the battery drains fast guide, then consider a new pack.
Where to replace it
A Realme service centre fits genuine packs, tests the new cell after fitting and checks the connector seats fully, which matters on budget phones where the flex cable is short. Trusted repair shops can do the job too, as long as they match BLP877 on the old cell. Our Oppo, Realme and OnePlus battery list collects related codes.
Charging habits for a 10 W phone
Ten watt charging is slow but kind to the pack. The best habit is simple: charge when the phone drops to about a quarter, and unplug when it is near full if you are around. Overnight charging on a hard surface is fine. Avoid fast chargers from other phones; the C33 will only draw what it can accept, but cheap high power adapters sometimes run hot and supply unstable current.
If the phone takes much longer than usual to charge, try another cable before blaming the battery. Worn cables are the most common cause of slow charging on budget Realme phones.
Realme C33 battery model compared with similar phones
Inside the same family, the C35 and 8i use faster charging but the same BLP877 code in listings. That means the pack itself does not limit the C33's speed; the charging circuit and adapter do. Fitting a C35 charger will not make the C33 charge faster than its design allows.
Frequently asked questions
What is the Realme C33 battery model name?
BLP877 in most seller listings, a 5000 mAh pack; the old cell's label confirms it.
What is the Realme C33 battery capacity?
5000 mAh, with 10 W charging in the box.
Is the Realme C33 battery the same as C35?
Listings use BLP877 for both, along with the C31 and 8i.
What is the model number of Realme C33?
RMX3624, shown under About phone in Settings.