About this replacement
Samsung Galaxy Note 8 — 3.85V Li-Polymer Replacement Battery (EB-BN950ABE)
This 3.85V Li-Polymer cell replaces the original EB-BN950ABE battery in the Samsung Galaxy Note 8 and Galaxy Note 8 Duos. Capacity is 3300mAh (12.71Wh), matching the factory specification. It fits SM-N9500 and the full Note 8 variant lineup including TD-LTE Duos models.
- Note 8 variant coverage: The SM-N9500, Duos, and TD-LTE Duos variants all share the same battery footprint, connector pinout, and BMS handshake protocol — one cell covers every unit in the Note 8 generation.
- Bench tested on actual hardware: We ran this cell on a Note 8 bench unit and confirmed the BMS accepted charge negotiation without fault flags, and that the charge IC cycled through CC/CV phases cleanly from 0% to full.
- 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 recalibrate its coulomb counter against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.
Sudden shutdown at 20–30% on the replacement cell
This is a voltage cliff issue. Under high-draw conditions — active LTE modem, screen at full brightness, or GPS — the cell voltage drops faster than the fuel gauge IC predicts based on the old discharge curve. The phone's low-voltage cutoff triggers before the displayed percentage reaches zero. One full discharge-charge cycle without fast charging resets the coulomb counter and tightens the IC's voltage-to-percentage mapping. After calibration, shutdowns below 20% stop occurring.
Phone not powering on after the replacement battery sat in storage
Li-Polymer cells shipped or stored for extended periods can self-discharge below 2.5V per cell. At that level, the BMS enters lockout mode and blocks current flow to protect the cell from damage. The phone will show no sign of life — no charge animation, no vibration. Connect to a wall charger at 5V/1A (not a fast charger) and leave it undisturbed for 20–30 minutes. Once voltage climbs above the BMS recovery threshold, the charge animation will appear and normal charging resumes.