About this replacement
OnePlus Nord N10 5G — 3.87V Li-Polymer Replacement Battery (BLP815)
This is a 3.87V, 4150mAh (16.06Wh) Li-Polymer battery for the OnePlus Nord N10 5G, covering model numbers BE2025, BE2026, and BE2029. It replaces the original BLP815 cell when the existing battery no longer holds adequate charge or fails to power the device. Swap it when the phone shuts down unexpectedly or the percentage reading becomes erratic.
- Nord N10 5G platform fit: The BE2025, BE2026, and BE2029 variants share the same cell footprint, connector pinout, and BMS handshake protocol — one battery covers all three. No modification required to the flex connector or housing.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on Nord N10 5G hardware. The BMS accepted the charge IC handshake without fault codes, and the fuel gauge IC tracked state-of-charge correctly after one full calibration cycle.
- First-cycle fast charge tip: On first use after installation, disable Warp Charge for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.
Why the Nord N10 5G reports wrong battery percentage after a cell swap
The fuel gauge IC on the Nord N10 5G stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The IC reports percentage based on old data, so readings can appear inflated or deflated until the counter resets. One full discharge to automatic power-off followed by an uninterrupted charge to 100% forces the coulomb counter to re-anchor to the new cell's actual endpoints.
Sudden shutdown at 20–30% on the replacement cell
This happens when the modem or display draws a current spike and the cell voltage drops faster than the fuel gauge IC predicted — the phone reads 25% on its old curve but the cell is already near the BMS cutoff threshold. The BMS trips the protection circuit and the phone cuts off instantly to prevent deep discharge damage. It is not a faulty battery — it is an uncalibrated gauge reading a fresh cell with a steeper voltage cliff than the aged original. Run one full cycle without fast charging; after that, the gauge maps the new cliff correctly and shutdowns at low percentage stop.