Getac GK5CN-14-20-4S1P-0 Replacement Battery 15.2V 4000mAh

Getac GK5CN-14-20-4S1P-0 — 15.2V Li-Polymer Replacement Battery

This is a 15.2V, 4000mAh (60.8Wh) Li-Polymer battery for Getac rugged notebooks. It matches OEM part numbers GK5CN-14-20-4S1P-0, GK5CN-00-13-4S1P-0, and GK5CN-03-17-4S1P-0. If your current cell is swelling, no longer holding charge, or the BIOS is flagging poor battery health, this is a direct cell-level swap.

• Multi-part-number coverage: Getac issued three OEM part numbers across production runs of this rugged notebook platform — GK5CN-14-20-4S1P-0, GK5CN-00-13-4S1P-0, and GK5CN-03-17-4S1P-0. All three share the same 15.2V four-cell series configuration, connector pinout, and BMS communication protocol, so a single replacement cell covers all three variants.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a Getac rugged notebook to verify BMS handshake, charge acceptance to full rated capacity, and correct state-of-charge reporting back to the OS. The fuel gauge IC authenticated the cell without throwing an unknown-device fault.
• BIOS battery learn cycle after swap: After installing this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears routinely after any cell swap on Getac notebooks.

Why the BIOS reports poor battery health immediately after a new cell install

Getac notebooks store historical cycle count, charge capacity, and health metrics in EEPROM on the battery's BMS board. When a new cell arrives, the EEPROM either contains default factory values or zeroed data that the BIOS interprets as degraded. The laptop hasn't measured the new cell yet — it's reading stale or blank records. Running the full discharge-to-hibernate, then a complete uninterrupted charge, forces the BIOS to write fresh calibration data and clear the warning.

Laptop shutting down at 20–30% shown on the fuel gauge

This happens when the fuel gauge IC hasn't been calibrated against the new cell's actual voltage curve. The OS believes 20–30% is remaining, but the cell voltage is already dropping past the BMS low-voltage cutoff threshold under combined CPU and display load. It's a calibration gap, not a fault with the replacement cell. Run two to three full discharge-to-hibernate, charge-to-100% cycles and the fuel gauge will re-map accurately to the real cell floor — typically around 12.0V under load.