OnePlus Nord N100 Replacement Battery BLP813 3.85V 4700mAh

MetroPC Nord N100 — 3.85V Li-Polymer Replacement Battery (BLP813)

This is a 3.85V, 4700mAh Li-Polymer battery for the OnePlus Nord N100 (BE2015). It replaces OEM part BLP813 — the original cell used in this device from the factory. Fits Nord N100 handsets where the original battery no longer holds a full charge or fails to power on.

• Nord N100 / BE2015 fitment: Both model references (Nord N100 and BE2015) identify the same hardware revision. They share the same chassis dimensions, connector pinout, and BMS communication protocol — this cell fits both without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Nord N100 board. The BMS handshake completed correctly, charge current ramped as expected, and the protection circuit tripped at the correct cutoff voltage at the low end.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's actual discharge curve before high-current charging pushes significant current into an uncalibrated cell — preventing early percentage drift.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC is still calibrated to the old cell's voltage curve. A fresh cell has a steeper voltage drop at the low end than a degraded original — the phone's cutoff logic sees a voltage cliff and shuts down before the percentage counter reaches zero. The fix is one full discharge-charge cycle with fast charging disabled. After that cycle, the coulomb counter recalibrates and shutdowns stop occurring above 5–10%.

USB fast charge not accepting on the first cycle after swap

On the first cycle, some Nord N100 units fall back to standard 5V charging rather than engaging the device's fast charge protocol. This occurs because the charge IC performs a brief impedance check on the new cell before allowing elevated current — a safety step, not a fault. Run one full standard charge cycle first. Fast charge typically re-engages automatically from the second cycle onward once the IC accepts the cell's impedance profile.