About this replacement
Lenovo IdeaPad Y710 / Y730 / Y530 Series — 11.1V Li-ion Replacement Battery (121TM030A)
This is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the Lenovo IdeaPad Y710, Y730, Y530, Y530A, and related models. It matches the original cell's voltage rail, connector pinout, and BMS communication protocol. Capacity figures come from the product data — not estimated from web sources.
- IdeaPad Y-series platform fit: The Y710, Y730, Y530, and Y530A share the same 11.1V three-cell battery bay, connector, and BMS handshake. One cell replacement covers the full lineup because Lenovo kept the electrical spec consistent across this generation of multimedia notebooks.
- Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle and confirmed the BMS handshake completed correctly — the system recognised the battery, reported state-of-charge accurately, and did not throw an unknown device flag at POST.
- Post-install discharge cycle on the Y-series: After fitting, run the laptop on battery until it hibernates at low charge, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting battery health as poor immediately after replacement
The IdeaPad Y-series stores battery health data in EEPROM on the old cell. When a new cell installs, the BIOS reads stale EEPROM values and flags the battery as degraded — even though the cell is new. This is not a fault with the replacement. Run one complete discharge-to-hibernate cycle followed by a full uninterrupted charge. After one or two of these learn cycles, the BIOS recalibrates against the actual cell chemistry and the health warning clears.
Laptop shutting down at 20–30% charge shown on the IdeaPad Y710
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The gauge loses track of the real state of charge as cell voltage drops steeply under combined CPU and display load — what the system reads as 25% is actually close to the cutoff floor. It is not a defective cell. Run two full discharge-to-hibernate cycles charging back to 100% each time. After calibration, the gauge tracks correctly and the laptop holds charge down to the reported low single digits before shutting off.