Lenovo ThinkPad Yoga 15 Replacement Battery 15.1V 4300mAh

Lenovo ThinkPad Yoga 15 — 15.1V Li-Polymer Replacement Battery (SB10F46446)

This 15.1V, 4300mAh (64.93Wh) Li-Polymer battery replaces the original 4ICP6/58/92 cell in the Lenovo ThinkPad Yoga 15 2-in-1 convertible laptop. It covers models including 20DQ001KUS, 20DQ0038GE, and 20DRS02AGE. OEM part numbers SB10F46446, SB10F46452, 00HW008, 00HW009, and 00HW014 all cross to this cell.

• ThinkPad Yoga 15 compatibility: These models share a single 15.1V four-cell Li-Polymer pack with a standardised SMBus connector and BMS handshake. The same voltage rail and cell configuration runs across the full 20DQ and 20DR production runs, so one pack fits all variants listed.
• Bench tested on actual hardware: We cycled this pack on a ThinkPad Yoga 15 board and confirmed the BMS initialised correctly on first insertion. Charge acceptance reached full capacity without the controller triggering a fault code or capping the charge cycle early.
• First-cycle conditioning on the ThinkPad Yoga 15: After installing, run one full discharge 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 ThinkPad firmware.

BIOS reporting poor battery health immediately after replacement

ThinkPad firmware reads health data from EEPROM registers stored on the original cell. When a new pack is installed, those registers are blank or mismatched, so the BIOS flags poor health before any real capacity data exists. This is a firmware state — not a fault with the replacement cell. Running the battery learn cycle (full discharge to hibernate, full uninterrupted charge) gives the BIOS real charge and discharge data to write to the new cell's EEPROM. After one or two full cycles, the health indicator updates to reflect actual cell condition.

Laptop shutting down at 20–30% charge shown on the gauge

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge reads a percentage mapped to the old cell's characteristics, so it underestimates how close the voltage is to the cutoff cliff. Under full CPU plus display load, voltage drops faster than the gauge expects and the system shuts down before it reaches the predicted 0%. Run two complete discharge-to-hibernate and charge-to-100% cycles — by the second cycle the fuel gauge IC recalibrates its internal model and the shutdowns stop.