Laptop Battery 42T4881 42T4877 for Lenovo ThinkPad X220T Series

Replace Part Number:
42T4881 42T4882 42T4877 42T4878
Compatible Laptop Model:
For Lenovo ThinkPad X220T Series Notebook

Installation and usage instructions:

1. Before replacing the battery, be sure to turn off the power first and then remove the charger plug. Replacing the battery during the startup process may pose a safety hazard.
2.After removing the original battery, press the power button continuously for 10 seconds without releasing it. Release the remaining power and static electricity on the motherboard before replacing the new battery.
3. Before installing a new batter
y, confirm the positive and negative poles of the battery, especially the built-in battery, and be careful not to plug it in incorrectly.

Regarding Capacity:

Lithium batteries are consumables, and it is normal for their capacity to fluctuate by around+5% due to factors such as inventory time and usage environment.