Inside every Nord CE 2 5G (IV2201) sits the pack whose BLP903 battery model name people also type as blp 903. OnePlus advertised 4500 mAh, and a pre-launch certification showed it as two cells of 2200 to 2250 mAh, which is how the phone supports 65 W charging.
Labels on replacement packs reflect that: some print 4500 mAh, others 2250 mAh at 7.74 V, and a few 2200 mAh. All describe the same two cell design, storing about 17.4 Wh.
Quick facts
The phone that uses the BLP903 battery model name
Retailers in India, Europe and the Gulf list BLP903 only for the Nord CE 2 5G. The phone level page for the CE 2 covers the phone side, including how it differs from the CE 2 Lite.
Reading a two cell label
| Label shows | What it means |
|---|---|
| 4500 mAh | Total, as OnePlus markets it |
| 2250 mAh, 7.74 V | Per pair of cells in series |
| 2200 mAh, 7.74 V | Rated minimum per pair |
Compare by watt hours: all three work out to about 17 to 17.4 Wh.
The incompatible copy problem
One aftermarket BLP903 drew a buyer review that simply says it was not compatible. The likely cause is a pack with the right code but a different connector or protection board. Choose a listing that mentions IV2201 by name and prints 7.74 V on the cell, or go straight to OnePlus service.
A two cell pack that is wrongly made can overheat at 65 W. A CE 2 running hot on its charger after a swap needs unplugging and a trip back to the fitter.
Why the protection board matters
A two cell pack carries a small protection board that balances the cells and talks to the phone's charging chip. Fake or mismatched boards are the usual reason a replacement BLP903 refuses to charge fast, shows wrong percentages or is flagged as not genuine. A good pack keeps 65 W charging working and reports a sensible health figure. If fast charging stops working after a swap while the original adapter is used, the board is the likely cause, and the pack should go back.
BLP903 and the other Nord packs
The Nord CE 5G uses BLP845, the Nord 2 and 2T use BLP861, and the CE 2 Lite uses BLP927. All are BLP codes because OnePlus shares its numbering with Oppo and Realme, but none of them swaps with another.
Living with a BLP903
A healthy pack gives a full day, and 65 W charging refills it in about half an hour. Wear shows as falling screen time and charging that slows even with the original adapter. Our health check guide explains how to test it before paying for a replacement.
Signs of a worn BLP903
Look for screen time falling well below a full day, the phone shutting down around 15 to 20 percent, or charging that takes much longer than half an hour from low with the original adapter. A warm back during light use is another clue. These signs together suggest the pack has lost a good share of its capacity, so the next step is a proper replacement.
Frequently asked questions
Which phone uses the BLP903 battery?
The OnePlus Nord CE 2 5G, model IV2201.
Is BLP903 4500 mAh or 2250 mAh?
Both: it is two 2250 mAh cells in series at 7.74 V, sold as 4500 mAh.
Why was my BLP903 replacement not compatible?
Some copies have a different connector or board. Buy one that names IV2201 and shows 7.74 V.
Is blp 903 the same as BLP903?
Yes. Many searches simply add a gap between BLP and 903.
Can a BLP903 go into a Nord 2 or Nord 2T?
No. The Nord 2 and Nord 2T use BLP861, which has a different outline and connector even though it is also a two cell 4500 mAh pack.
Is BLP903 shown anywhere in the phone's menus?
No menu shows it; the code is only on the pack beneath the glued CE 2 back.