About this replacement
Lenovo 3000 C200 8922 — 10.8V Li-ion Replacement Battery (40Y8315 / 92P1184)
This is a 10.8V, 4400mAh (47.52Wh) Li-ion replacement battery for the Lenovo 3000 C200 8922 and related N100 series notebooks. It replaces OEM part numbers including 40Y8315, 40Y8322, FRU 92P1184, and FRU 42T4514. Physical dimensions are 206.40 x 41.80 x 27.50mm — verify fitment against your current cell before ordering.
- 3000 C200 and N100 series compatibility: The C200 8922, 3000 N100 0689, and N100 0768 all share the same 10.8V three-cell battery rail, connector pinout, and BMS communication protocol — that is why one part number spans all three platforms.
- Bench tested on actual hardware: We ran this cell against the C200 8922 BMS handshake. The protection circuit responded correctly to charge termination, over-discharge cutoff, and cell-balance events with no error flags thrown during the test cycle.
- First-cycle reset procedure for this platform: After installing, run one full discharge to hibernate-cutoff then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on this series.
Laptop shutting down at 20–30% shown after battery swap
This is a voltage cliff, not a faulty cell. Under combined CPU and display load, the battery voltage drops faster than the fuel gauge IC recalibrates against the new chemistry. The gauge still references discharge curves from the old, degraded cell stored in EEPROM. The fix is two full calibration cycles — discharge fully to hibernate, charge uninterrupted to 100% — after which the gauge IC builds accurate voltage-to-capacity mapping for the new cell. After two cycles, the cutoff point should return to below 5% indicated.
BIOS reporting new battery health as poor or unknown immediately after install
The BIOS reads health data from the battery's EEPROM — not live cell voltage. When a new cell arrives, that EEPROM holds factory defaults that do not match the cumulative charge data the BIOS expects from an established battery. The system flags it as unknown or degraded because the learn cycle has not run yet. Complete one full discharge-to-hibernate followed by an uninterrupted charge to 100%, then recheck under ThinkPad Battery Manager or Windows power diagnostics. The health status clears once the BIOS has logged a complete cycle against the new cell.