About this replacement
Samsung NP-700 Series — 14.8V Li-Polymer Replacement Battery (AA-PBZN8NP)
This is a 14.8V, 5400mAh Li-Polymer replacement battery for the Samsung NP-700 series notebook computers. It fits the NP700Z7C, NP-700Z5B, NP-700Z, and over 60 additional NP-700 variants. OEM part numbers AA-PBZN8NP, BA43-00318A, AA-PLZN8NP, and SAM1270 all cross-reference this cell.
- NP-700 series compatibility: These models share the same 14.8V four-cell Li-Polymer architecture, identical connector pinout, and the same BMS communication protocol over the SMBus line — so one cell works across the full NP-700 chassis family.
- Bench tested on actual hardware: We ran this cell on an NP700Z7C and verified the BMS handshake completed correctly, charge current accepted at the full rate, and the protection circuit tripped cleanly at both over-voltage and under-voltage thresholds.
- Post-install calibration on the NP-700: After fitting, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears after every cell swap on this platform.
Why the NP-700 shuts down at 20–30% after a battery swap
The NP-700 BIOS stores discharge curve data from the previous cell in its fuel gauge IC. When a new cell arrives with different internal resistance, the stored curve no longer matches real voltage behaviour under CPU and display load. At around 20–30% shown, the cell voltage drops below the BIOS cutoff threshold faster than the gauge expects, triggering an immediate shutdown. Running two to three full charge-discharge cycles recalibrates the fuel gauge IC against the new cell's actual discharge profile and eliminates the early cutoff.
BIOS reporting battery health as "poor" or "replace soon" after fitting a new cell
This warning comes from EEPROM data the old battery wrote to the system — cycle count, full-charge capacity, and health flags persist in firmware after the cell is swapped. The new cell has not yet written its own data, so the BIOS reads stale values and flags a fault. Boot into the Samsung Battery Manager or run a BIOS-level battery learn cycle under Settings to force a fresh EEPROM write. After one complete learn cycle the health indicator will update to reflect the actual new cell state.