About this replacement
Lenovo V4400 / Ideapad 100 80QQ — 14.4V Li-ion Replacement Battery (L15M4A01)
This 14.4V, 2200mAh (31.68Wh) Li-ion battery replaces the original cell in the Lenovo V4400 notebook and Ideapad 100 80QQ series. It slots into the same bay and connects via the original multi-pin connector. Cross-references include L15S4A01, L15L4A01, and a range of 5B10-series Lenovo part numbers covering the TianYi100-14IBD and related variants.
- V4400 and Ideapad 100 platform fit: These models share the same 14.4V four-cell architecture and a common BMS handshake protocol. The replacement cell carries the same EEPROM-level identification data the Lenovo firmware expects, so the system recognises it on first boot without rejecting it as an unknown source.
- Bench tested on actual hardware: We ran this cell on a V4400 board and monitored the BMS through charge and discharge cycles. The protection circuit held cutoff at the correct low-voltage threshold and accepted a full charge without tripping the overcharge flag.
- Post-install calibration for the V4400: After fitting, drain the battery to hibernate cutoff under normal use — do not force-drain — then charge uninterrupted to 100%. This single learn cycle resets the BIOS fuel gauge against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap on this platform.
Laptop shutting down at 20–30% shown after battery replacement
This happens because the fuel gauge IC still holds calibration data from the old, degraded cell. When the new cell reaches a voltage point the old profile mapped to 20–30%, the system treats it as depleted and cuts power. The cell itself has capacity remaining — the gauge just can't read it yet. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%; after two to three cycles the gauge tracks correctly. If shutdown still occurs early, check that the BIOS is not enforcing a battery care charge limit below 80%.
BIOS reporting new battery health as "poor" immediately after install
The Lenovo BIOS reads health status from EEPROM wear data written by the old cell over its service life. A new cell arrives with fresh EEPROM counters that don't match the learned discharge curve the firmware expects, so it flags health as poor or unknown. This is a calibration state, not a fault. Complete one full discharge-to-hibernate cycle and a full uninterrupted charge; the BIOS recalculates health against actual cell behaviour and clears the warning. After the learn cycle, battery health should display as normal in Lenovo Vantage or the BIOS power screen.