Thunderobot G150S Replacement Battery 11.1V 4400mAh Li-ion

Thunderobot G150S-47104G500G9502G Series — 11.1V Li-ion Replacement Battery

This is an 11.1V 4400mAh (48.84Wh) lithium-ion battery for the Thunderobot G150S-47104G500G9502G and related G150 gaming laptop models. It fits the G150MG-478G1T, G150P-47108G1TG8808G, G150TH, and over a dozen additional variants sharing the same battery bay and connector. Install it when the original cell no longer holds a useful charge or fails to charge at all.

• G150 series compatibility: These models share a common battery bay geometry, 11.1V nominal rail, and the same BMS handshake protocol — which is why one cell covers the full G150 line without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on G150-series hardware. The BMS negotiated correctly, charge termination triggered at the expected cutoff, and the protection circuit responded to over-discharge conditions without tripping falsely under gaming load.
• Post-install calibration cycle: After fitting this cell, run the laptop on battery power until it hibernates at low charge, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the false "poor health" warning that almost always appears after a cell swap.

Why the G150S shuts down at 20–30% after a battery swap

The G150S uses a fuel gauge IC that stores learned voltage-to-capacity curves from the old cell. When a new cell goes in, those curves no longer match the actual chemistry. The BIOS reads voltage and incorrectly maps it to 20–30% remaining, then hits its shutdown threshold while the cell still has charge left. Running two or three full discharge-to-hibernate then full-charge cycles recalibrates the fuel gauge IC against the new cell's actual voltage profile.

BIOS reporting battery Wh rating as wrong after replacement

The system reads Wh data from the battery's EEPROM, which stores the manufacturer's rated figure. If the EEPROM value differs from what the BIOS expects, Windows or the firmware reports a mismatched Wh figure in system info. This is an EEPROM rated-versus-actual difference — not a fault with the cell itself. The battery charges and operates normally. Verify by checking actual charge voltage at the connector; it should read 12.6V at full charge.