Razer Blade Pro 17 RZ09-0287 Replacement Battery 15.4V 4500mAh

Razer Blade Pro 17 RTX 2080 Max Q — 15.4V Li-Polymer Replacement Battery (RC30-0287)

This is a 15.4V, 4500mAh (69.3Wh) lithium-polymer replacement battery for the Razer Blade Pro 17 series. It fits the RTX 2080 Max-Q, RTX 2060, and 2019–2020 Blade Pro 17 models sharing the RC30-0287 connector and BMS handshake. Install it when the original cell no longer holds charge or the OS reports critically degraded health.

• Blade Pro 17 series fit: The 2019, 2020, RTX 2060, and RTX 2080 Max-Q variants all run the same 15.4V four-cell pack with an identical ZIF connector and BMS communication protocol — that shared electrical spec is why one cell covers all these SKUs.
• Bench tested on actual hardware: We ran this pack through charge, full discharge, and a second charge cycle on a Blade Pro 17 chassis. The BMS negotiated correctly, charge current stepped down at 95% as expected, and cutoff triggered cleanly at low voltage without triggering an emergency shutdown.
• Post-install discharge cycle on Blade Pro 17: After fitting this cell, run the laptop on battery until it hibernates at the BIOS low-voltage cutoff, then charge uninterrupted to 100%. This resets the fuel gauge IC's learn cycle against the new cell and clears the inaccurate health warning that appears in Razer Synapse and Windows after every cell swap.

Why the Blade Pro 17 shuts down at 20–30% battery remaining after a cell swap

The Blade Pro 17's fuel gauge IC stores discharge curve data from the old cell in memory. When a new cell is installed, the IC maps voltage readings against the old curve — which no longer matches. Under full CPU and GPU load, the 15.4V pack voltage sags faster than the stale curve predicts, and the laptop interprets a midrange state-of-charge as a critical low-voltage event. Running two full calibration cycles retrains the IC against the actual discharge curve of the replacement cell and stops the premature shutdowns.

BIOS reporting the new battery as 0% or "unknown" immediately after installation

This happens because the EEPROM data embedded in the old battery — cycle count, rated Wh, and health flags — no longer exists for the new cell until a charge cycle writes fresh data. The Razer BIOS reads these values on boot; a missing or blank EEPROM response returns a null state. Connect AC power, allow a full uninterrupted charge to 100%, then reboot. The BIOS will read the new cell's EEPROM correctly and display an accurate state of charge, typically resolving at 15.4V full charge.