About this replacement
Lenovo ThinkPad Yoga 260 — 15.2V Li-ion Replacement Battery (00HW026)
This is a 15.2V, 2900mAh (44.08Wh) Li-ion cell for the ThinkPad Yoga 260 2-in-1 convertible laptop. It fits the full range of Yoga 260 variants, including AU-market models. OEM part numbers covered: 00HW026, 00HW027, SB10F46464, and SB10F46465.
- Yoga 260 variant coverage: All Yoga 260 sub-models share the same 15.2V four-cell Li-ion architecture, connector pinout, and BMS handshake protocol. One battery fits every variant in the 20FE and 20FD chassis lines.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Yoga 260 unit. The BMS negotiated correctly with the EC firmware, reported accurate state-of-charge, and held voltage under combined CPU and display load without triggering a false low-voltage cutoff.
- Post-install calibration on the Yoga 260: After fitting this cell, run one full 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 in Lenovo Vantage after every cell swap.
BIOS reporting battery health as poor after replacement on the Yoga 260
The Yoga 260 EC stores cycle count and health data in EEPROM from the previous cell. When a new cell is fitted, the BIOS reads stale data and flags the battery as degraded before it has run a single cycle. This is a firmware state issue, not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS learn cycle to rewrite that EEPROM data against the new cell. After two to three cycles, Lenovo Vantage should report health in the normal range.
Yoga 260 shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated its discharge curve against the new cell. The reported percentage and the actual remaining capacity are out of sync, so the laptop hits the hardware low-voltage floor before the OS gauge reaches zero. It is not a faulty cell — it is a calibration gap. Run two full discharge-to-hibernate cycles with no interruption, then charge fully each time. After those cycles the fuel gauge IC recalibrates its curve and the shutdown should move back to below 5% remaining.