About this replacement
Lenovo IdeaPad Y470 Series — 11.1V Li-ion Replacement Battery (57Y6625)
This 11.1V, 4400mAh (48.84Wh) Li-ion battery replaces the original pack in the Lenovo IdeaPad Y470, Y470A, Y470D, and Y470G, along with 17 additional Y470-series variants. It matches the OEM voltage rail, connector pinout, and BMS communication spec required by the Y470 platform. Capacity figures come from the product data — not inflated web listings.
- Y470 platform compatibility: All Y470-series variants share the same 11.1V three-cell voltage rail, identical 9-pin connector, and the same BMS handshake protocol. One cell covers the full lineup because Lenovo standardised the battery interface across Y470A, Y470D, and Y470G at the hardware level — not just by marketing name.
- Bench tested on actual hardware: We ran this cell on a Y470 unit and monitored BMS communication through full charge and discharge cycles. The protection circuit engaged correctly at low-voltage cutoff, and charge termination fired at the expected 12.6V endpoint with no current runaway.
- Post-install calibration on the Y470: After fitting, run the laptop on battery power until it hibernates at low-charge cutoff, then charge uninterrupted to 100% without interruption. This forces the Y470 BIOS to complete its battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting poor battery health immediately after replacement
The Y470 BIOS reads health data stored in the old cell's EEPROM and carries that data forward until a learn cycle resets it. A brand-new cell will show "poor health" or a degraded charge percentage straight after install — this is an EEPROM artefact, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the BIOS battery profile against the new cell's actual capacity. After two to three cycles the health indicator normalises.
Laptop shuts down at 20–30% battery shown on the gauge
This happens when the fuel gauge IC hasn't calibrated against the new cell's voltage curve yet. The gauge reads the old cell's discharge profile and predicts shutdown too early — the laptop cuts power before the displayed percentage reaches zero. The fix is the same learn cycle: discharge to hibernate cutoff, then charge to 100% without interruption. After two full calibration cycles the gauge tracks the new cell accurately and the premature shutdowns stop.