About this replacement
Samsung Galaxy Book2 Pro 13 — 15.44V Li-Polymer Replacement Battery (AA-PBMN4MR)
This is a 15.44V, 4000mAh (61.76Wh) Li-Polymer battery for the Samsung Galaxy Book2 Pro 13 ultrabook. It replaces part number AA-PBMN4MR and fits the NP930XED series including KA1BE, KA1CL, KA1DE, and over 124 additional regional variants. Install this when the original cell no longer holds a usable charge or the system shuts down unexpectedly under load.
- NP930XED series fit: All NP930XED variants share the same 15.44V battery rail, connector pinout, and BMS handshake protocol. A single cell SKU covers the full regional lineup because Samsung locked the hardware spec across those production runs.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Galaxy Book2 Pro 13 unit. The BMS negotiated correctly, charge current ramped as expected, and the protection circuit tripped at the correct low-voltage threshold without spurious cutoffs.
- BIOS learn cycle after install: After fitting this cell, run the laptop down to hibernate cutoff on battery only — no AC — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on the NP930XED platform.
Galaxy Book2 Pro 13 shutting down at 20–30% after a battery swap
This is a voltage cliff problem, not a capacity fault. Under combined CPU and display load, the new cell hasn't yet been mapped by the fuel gauge IC, so the system reads available voltage inaccurately and triggers a protective shutdown before the cell is actually depleted. The BIOS battery learn cycle described in the care tip above resolves this in one to two full discharge-charge passes. After calibration, the fuel gauge tracks the new cell's discharge curve correctly and shutdowns at low-but-non-zero percentages stop.
BIOS reporting 0% or "unknown" battery immediately after installing a new cell
The EEPROM data written by the old cell persists in the system's battery management registers after a swap. The firmware briefly sees a mismatch between the stored cell profile and the new cell's reported parameters, which surfaces as 0% or an "unknown device" flag in both the BIOS and Windows battery status. This is not a fault with the replacement cell. Boot into the Samsung Battery Manager or Windows Settings > Power & Battery, confirm the cell is detected at any non-zero voltage, then complete one full discharge-to-hibernate and full recharge cycle to rewrite the register values to the new cell's baseline.