Anonymous6 years ago000I have a Lenovo W540 and would like to replace the battery and power supply. I saw that this model is compatible, which power supply should I choose?Show in original language (French)robynnesh6 years ago000I personally bought this battery for my t440p and it works perfectly (4h autonomy). If the supplier mentions it as compatible for a W540, you can get it. The power supply will remain the same as the original one.Show in original language (French)Comment