Mechrevo X6Ti-H 10.8V Replacement Battery 4400mAh

Mechrevo X6Ti-H Series — 10.8V Li-ion Replacement Battery (7550830-160201791)

This is a 10.8V, 4400mAh (47.52Wh) Li-ion replacement battery for the Mechrevo X6Ti-H, X6Ti-M6, X6Ti-E3, and MR X6Ti-H notebooks. It replaces OEM part numbers 7550830-160201791, 7603830-161409927, BATRNFSV12-3100, GE5SN-00-01-3S2P-1, and NFSV151X-00-03-3S2P-0. The original cell degrades over charge cycles, losing capacity and eventually failing to hold voltage under CPU and display load.

• X6Ti platform compatibility: The X6Ti-H, X6Ti-M6, and X6Ti-E3 share a common 3S2P cell configuration and the same BMS connector pinout. Voltage rail and handshake protocol are identical across these models, so one cell fits all three without firmware or physical modification.
• Bench tested on actual hardware: We cycled this battery through full charge and discharge on an X6Ti-series board. The BMS completed authentication, reported state-of-charge correctly, and held voltage stable through sustained CPU-plus-display load without triggering an emergency cutoff.
• Post-install calibration on the X6Ti: After fitting this cell, run one full discharge until the laptop hibernates at its low-voltage cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after fitting a new cell

The X6Ti BIOS reads health data stored in the battery's EEPROM, not from live voltage readings. When a new cell arrives, its EEPROM holds factory default values that don't match the laptop's learned charge history. The BIOS compares these values against its own records, sees a mismatch, and flags the battery as degraded or unknown. Running one full discharge-to-hibernate followed by a full uninterrupted charge completes the learn cycle and rewrites the BIOS reference data to match the new cell.

Laptop shuts down at 20–30% charge shown on the X6Ti

This happens when the cell's actual voltage under full CPU and display load drops faster than the fuel gauge IC predicted. The gauge was calibrated against the old, degraded cell, so its percentage readings no longer map accurately to real cell voltage. When true cell voltage hits the BMS cutoff threshold, the system shuts down even though the OS still shows charge remaining. Run two to three full discharge-and-charge cycles to let the fuel gauge IC recalibrate against the new cell's voltage curve — after that, the displayed percentage and actual remaining capacity will align. Check that the gauge reads correctly by verifying the cell sits above 10.0V at the 15% mark.