About this replacement
Lenovo ThinkPad Yoga 460 — 11.4V Li-Polymer Replacement Battery (SB10F46459)
This is an 11.4V, 4200mAh Li-Polymer replacement battery for the Lenovo ThinkPad Yoga 460 and ThinkPad P40 Yoga series. It replaces OEM part numbers SB10F46459, 00HW021, 00HW020, and SB10F46458. Capacity is 47.88Wh, matching the original cell specification.
- ThinkPad Yoga 460 and P40 Yoga platform fit: These models share a common 11.4V three-cell Li-Polymer architecture with the same physical connector and BMS handshake protocol. The P40 Yoga variants — including 20GQ0004GE and 20GR — draw from the same battery bay specification, so one part number covers the full range.
- Bench tested on actual hardware: We cycled this cell on a ThinkPad Yoga 460 and confirmed the BMS completed charge handshake without error. The fuel gauge IC registered capacity correctly after two calibration cycles. No thermal events or cutoff trips during discharge.
- Post-install calibration cycle: After fitting this battery, run one full discharge to hibernate cutoff, then charge uninterrupted to 100% without unplugging mid-cycle. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on ThinkPad firmware.
Why the ThinkPad Yoga 460 reports poor battery health immediately after a cell swap
The ThinkPad BIOS stores learned charge data in EEPROM tied to the old cell's cycle count and internal resistance profile. When a new cell appears, that stored data no longer matches the actual chemistry, and the system flags it as degraded. This is not a fault with the replacement cell. Running a full discharge-to-hibernate then a full uninterrupted charge forces the BIOS to rewrite the learn cycle against the new cell. After one or two cycles, the health indicator normalises.
ThinkPad Yoga 460 shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC's stored discharge curve no longer matches the new cell's actual voltage profile. The system predicts 20–30% remaining based on old data, but the cell voltage drops below the BMS cutoff threshold sooner than expected. The fix is the same calibration sequence: discharge fully to hibernate, then charge to 100% in a single uninterrupted session. Repeat for two cycles and the fuel gauge recalibrates to the new cell's actual voltage cliff, which on this chemistry sits around 9.0V under load.