About this replacement
Gateway GWTN156-7BK / GWTN141 Series — 11.4V Li-Polymer Replacement Battery (5376275P)
This 11.4V, 4500mAh (51.3Wh) lithium-polymer battery replaces part number 5376275P in the Gateway GWTN156-7BK and GWTN141 series laptops. It fits multiple GWTN141 variants including the GWTN141-2BL, GWTN141-4BK, and GWTN141-4BL. If your original cell has lost capacity or stopped charging, this is the direct cell swap.
- GWTN156 and GWTN141 platform fitment: These models share the same 11.4V three-cell battery rail, connector pinout, and BMS handshake protocol — that is why one part number covers the full range. Cross-OEM references NV-509067-3S, UTL-509068-3S, and NV-549067-3S all map to the same physical cell.
- Bench tested on actual hardware: We ran this cell through charge, load, and BMS communication checks. The protection circuit responded correctly to over-discharge cutoff and charge termination at full capacity. SMBus data handshake to the host controller completed without errors.
- Post-swap calibration on Gateway BIOS: After fitting this cell, run one full discharge to hibernate cutoff — not a hard shutdown — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on Gateway firmware.
BIOS reporting battery health as poor immediately after replacement
Gateway BIOS reads health data from EEPROM stored on the battery's BMS chip. When you swap the cell, the EEPROM contains factory-default charge cycle counts and rated capacity values that the BIOS has never seen before. The firmware flags this mismatch as degraded health rather than a fresh cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge resets the learn cycle and synchronises the BIOS health display with the actual cell state.
Laptop shuts down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The IC still uses the old cell's discharge profile, so it misreads the remaining capacity and triggers a low-voltage shutdown before the display percentage reaches zero. The fix is two to three full discharge-and-charge cycles without interruption. After calibration, the cutoff should align with the cell's actual low-voltage threshold of approximately 9.0V under load.