ThinkPad W540

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Battery: These systems do not support batteries that are not genuine Lenovo-made or authorized. Systems will continue to boot, but may not charge unauthorized batteries. Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. Battery life (and recharge times) will vary based on many factors, including system settings and usage. 

**Battery life is based on the MobileMark® 2007 methodology and is an estimated maximum. Actual battery life may vary based on many factors, including screen brightness, active applications, features, power management settings, battery age and conditioning, and other customer preferences.

General System Information: Review key information provided by Microsoft® that may apply to your system purchase, including details on Windows 10, Windows 8, Windows 7, and potential upgrades/downgrades.Lenovo makes no representation or warranty regarding third-party products of services. 

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