The 3-cell ThinkPad Battery 68 powers X240, X250, W550, L450, T450s, T450, T550, T440 and T440s systems for longer. The rechargeable battery lasts for approximately 23.5 watt hours* and can be used with the T440, T440s and X240 systems. Each one utilises advanced Lithium-ion technology and over-discharge protection to prolong the life of the battery. The battery is safeguarded with a chip which authenticates with Lenovo systems.
*Battery life is affected by a multitude of factors, including: features, battery conditioning, power management, applications, screen brightness, and other customer preferences.Lithium-ion technology
3 cell system battery
Over-discharge protection to prolong the life of the battery
Battery energy (Watt-hours): 23.5Wh
Battery Safeguard chip authenticates with Lenovo systems
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