About this replacement
Razer Blade Stealth i7-8565U / 2019 13 GTX Edition — 11.55V Li-Polymer Replacement Battery (RC30-0281)
This 11.55V, 3600mAh (41.58Wh) Li-Polymer cell replaces the RC30-0281 battery in the Razer Blade Stealth i7-8565U, Blade Stealth 2019, and Blade Stealth 13 GTX Edition. It fits the 13.3-inch ultrabook chassis and matches the original connector pinout and BMS communication protocol. Voltage and capacity figures come directly from the OEM specification for this platform.
- Blade Stealth 13 platform fit: The i7-8565U, 2019, and GTX Edition models share the same 3-cell Li-Polymer pack geometry, 11.55V nominal rail, and RC30-0281 part number. The BMS handshake uses the same EEPROM addressing across all listed variants, so one cell works across the full Blade Stealth 13 line.
- Bench tested on actual hardware: We ran this cell on a Blade Stealth 13 chassis and confirmed the BMS initialised without fault codes, accepted a full charge cycle, and reported Wh capacity within normal tolerance in the Windows battery report.
- Post-swap BIOS learn cycle: After installing, run one full discharge to the 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 replacement
The Razer BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell during the first boot. The replacement cell has no charge history, so the firmware flags it as degraded before any calibration has occurred. This is not a fault with the cell — it is a firmware timing issue. Run one full discharge-to-hibernate then a full uninterrupted charge to 100%; the BIOS recalibrates and the health warning clears.
Blade Stealth shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet mapped the new cell's voltage curve. Under full CPU and display load, the voltage drops faster than the uncalibrated gauge expects, and the system interprets it as a hard cutoff threshold. The laptop shuts down even though the gauge still shows charge remaining. Run two to three full discharge-and-charge cycles; the fuel gauge IC tracks the actual voltage cliff on the new cell and the early shutdowns stop.