Avita CN6613-2S3P Replacement Battery 7.6V 4800mAh

Avita NS14A2 / Liber 13.3 — 7.6V Li-Polymer Replacement Battery (CN6613-2S3P)

This is a 7.6V, 4800mAh (36.48Wh) lithium-polymer replacement battery for the Avita NS14A2 and Liber 13.3 notebooks. It matches the OEM part number CN6613-2S3P and fits the original battery bay without modification. Voltage, connector, and BMS handshake all match the stock configuration on these two models.

• NS14A2 and Liber 13.3 compatibility: Both models share the same 7.6V two-cell architecture and use the same connector pinout and BMS communication protocol. One replacement covers both platforms without any adapter or firmware workaround.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the NS14A2 platform. The BMS handshake completed without fault codes, and charge acceptance tracked correctly from 0% to 100% under the stock BIOS charge controller.
• First-cycle calibration after install: After fitting this battery, run the laptop down to hibernate cutoff on normal workload, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell and clears the inaccurate health warning the BIOS throws after every cell swap.

Why the NS14A2 BIOS flags poor battery health immediately after a cell swap

The Avita NS14A2 stores battery EEPROM data from the previous cell — cycle count, rated capacity, and health flags — and carries that data forward until a learn cycle clears it. A new cell physically installed does not automatically reset this stored record. The BIOS reads the old data and reports poor health even though the replacement cell is at full capacity. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% overwrites the stored cycle data and resets the health flag to normal.

Laptop shuts down at 20–30% remaining on the gauge

This happens when the fuel gauge IC has not yet mapped the voltage curve of the new cell. The old calibration data predicts a safe floor voltage at a higher state of charge than the new cell actually reaches, so the system triggers shutdown early. It is not a fault with the replacement cell. Run two to three full discharge-to-hibernate cycles and the fuel gauge IC will re-map the curve — early shutdowns stop once the gauge tracks the cell down to its actual cutoff voltage near 6.0V.