About this replacement
Samsung Galaxy Note 4 — 3.85V Li-ion Replacement Battery (EB-BN910BBE)
This is a 3.85V, 6400mAh Li-ion replacement battery for the Samsung Galaxy Note 4. It fits SM-N910W8, SM-N910R4, SM-N910L, and over a dozen additional Note 4 variants sharing the EB-BN910BBE cell format. Swap it in when the original cell can no longer hold enough charge to get through a day.
- Note 4 variant compatibility: Samsung released the Note 4 across multiple carriers and regions — SM-N910W8 for Canadian carriers, SM-N910R4 for US Regional, SM-N910L for South Korea. All share the same EB-BN910BBE cell footprint, connector, and BMS handshake, so one cell covers the full lineup.
- Bench tested on actual hardware: We ran this cell on a Note 4 unit and confirmed the BMS negotiated correctly with the charge IC on first insertion. Voltage at rest read 3.85V nominal, and the fuel gauge IC accepted the new cell without throwing a charging fault.
- Fuel gauge recalibration on first use: Disable Samsung Adaptive Fast Charging for the first full discharge-charge cycle after installation. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell, which prevents erratic percentage readings from cycle one.
Sudden shutdown at 20–30% on a Note 4 cell swap
This is a voltage cliff issue, not a capacity issue. Under heavy modem or screen load, cell voltage can sag below the BMS cutoff threshold before the fuel gauge reads zero — so the phone shuts off with apparent charge remaining. On a new cell, this usually clears after one full discharge-charge cycle forces the coulomb counter to recalibrate. If shutdowns persist past two full cycles, check that the battery contacts on the phone chassis are clean and making solid contact with the cell terminals.
Phone reporting wrong percentage after installing the replacement cell
The Note 4's fuel gauge IC stores a discharge curve calibrated to the old, degraded cell. Drop in a new 6400mAh cell and the IC is still reading against that worn curve, which causes percentage jumps, premature low-battery warnings, or a stuck reading. One complete discharge down to automatic shutdown followed by a full uninterrupted charge resets the coulomb counter against the new cell's actual capacity. After that cycle, percentage reporting on most units stabilises within ±3%.