Packard Bell Easynote LM81 Replacement Battery 11.1V 6600mAh

Packard Bell Easynote LM81 Series — 11.1V Li-ion Replacement Battery

This is an 11.1V, 6600mAh (73.26Wh) lithium-ion battery for the Packard Bell Easynote LM series notebooks. It fits the LM81, LM82, LM83, and LM85, plus additional LM-series models sharing the same battery bay and connector. Install it when the original cell no longer holds a usable charge or fails to register in the BIOS.

• Easynote LM series compatibility: These LM-series models share a common 11.1V three-cell architecture, the same physical connector, and an identical BMS handshake protocol — which is why a single cell covers the full range without modification.
• Bench tested on actual hardware: We ran charge and discharge cycles on this cell and confirmed the BMS communicates correctly with the host board — reporting state-of-charge accurately and triggering cutoff at the correct low-voltage threshold.
• Post-install calibration on Easynote LM notebooks: After fitting this cell, run one full discharge until the laptop hibernates at its cutoff point, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that almost always appears after a cell swap on these notebooks.

Why the Easynote LM81 BIOS reports poor battery health after a cell swap

The Easynote LM series stores battery health data in EEPROM on the original cell's protection board. When you swap to a new cell, the BIOS reads fresh EEPROM and flags the battery as unknown or degraded because its learned charge profile is gone. This is a firmware reaction, not a fault with the replacement cell. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the BIOS enough data to re-establish its health baseline and clear the warning.

Laptop shuts down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual chemistry. The percentage displayed is based on old learned data, so the reading drifts well above reality under full CPU and display load. When the cell voltage drops below roughly 10.8V — the hardware cutoff — the laptop shuts off even though the OS still shows charge remaining. Complete two full discharge-to-hibernate and full-recharge cycles to force the fuel gauge IC to recalibrate against the new cell.