About this replacement
Razer Blade Pro 17 — 14.8V Li-Polymer Replacement Battery (GMS-C40)
This is a 14.8V, 5000mAh (74Wh) lithium-polymer replacement battery for the Razer Blade Pro 17 gaming laptop. It fits RZ09-00991102, Blade Pro 2015, and Blade Pro 2013 models sharing the GMS-C40 / 961TA005F part numbers. Install it when the original cell no longer holds voltage under load or fails to charge past a low threshold.
- Blade Pro 17 compatibility across model years: The 2013, 2015, and RZ09-00991102 variants share the same 14.8V four-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol — which is why one cell fits all three generations without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and controlled discharge on a Blade Pro 17 unit, confirmed the BMS negotiated correctly, verified cell voltage at each stage, and checked that the BIOS registered the pack without fault codes.
- Post-install discharge cycle on the Blade Pro 17: After fitting, run one complete discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after fitting a new cell
The Razer Blade Pro 17 BIOS reads health data stored in the old cell's EEPROM — not live cell chemistry. When you swap the cell, the BIOS compares current readings against stale EEPROM reference data and flags a mismatch as poor health. This is not a fault with the new cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite its reference table against the new cell's actual capacity curve. After two full cycles, the health indicator should read normal.
Blade Pro 17 shutting down with 20–30% charge shown on screen
This happens when the fuel gauge IC hasn't calibrated against the new cell yet and is working from inaccurate reference points. Under full CPU plus discrete GPU load, real cell voltage drops faster than the gauge predicts — the system hits the hardware low-voltage cutoff while the OS still shows charge remaining. It is not a defective cell. Discharge the laptop fully to the automatic hibernate point three times in a row, charging to 100% between each cycle, and the gauge IC will re-anchor its readings to the new cell's actual voltage curve.