About this replacement
Lenovo IdeaPad G460 — 11.1V Li-ion Replacement Battery (121000935)
This 11.1V, 6600mAh (73.26Wh) Li-ion battery replaces the original cell in the Lenovo IdeaPad G460 and its close variants, including the B470, B470A, and B470G series. It matches the OEM voltage rail and connector spec. Install it when the original cell can no longer hold a useful charge through a normal work session.
- G460 and B470 series fit: These models share the same 11.1V three-cell-series battery bay, connector pinout, and BMS communication protocol. That's why one cell covers all of them. Compatibility is electrical, not cosmetic.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an IdeaPad G460 unit. The BMS handshake completed without error flags, charge termination triggered correctly at full voltage, and the protection circuit tripped at the expected undervoltage threshold.
- Post-install calibration cycle: After fitting this battery, run the laptop down until it hibernates on its own, then charge it uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the false health warning that appears after every cell swap.
BIOS reporting poor battery health immediately after replacement
The IdeaPad G460 BIOS reads EEPROM data written by the previous cell — cycle count, charge history, and health estimates stored in the old battery's firmware. When a new cell arrives with fresh EEPROM values, the BIOS flags a mismatch and displays a health warning. This is not a fault with the replacement cell. Run one full discharge-to-hibernate followed by a single uninterrupted charge to 100%, and the BIOS learn cycle will overwrite the stale data with readings from the new cell.
Laptop shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC still references calibration data from the old cell. The percentage shown on screen is calculated from a capacity model that no longer matches the new chemistry. Under full CPU and display load, the actual cell voltage drops faster than the gauge predicts, and the system hits the low-voltage cutoff before the display reaches 0%. Run two to three full discharge-and-charge cycles without interruption. After that, the fuel gauge IC recalibrates against the new cell's actual voltage curve and the shutdowns stop. Target a resting voltage of 12.5–12.6V at the "full" reading to confirm the gauge has settled.