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Lenovo ThinkPad Battery 57++ 9-Cell
The 9-cell ThinkPad Battery 57++ extends the run time of the W541, T440p, T540p, W540, L440 and L540 systems. On average, the battery lasts for an incredible 100 watt hours*. Each one is rechargeable and uses over-discharge protection to ensure power flows securely. Advanced Lithium-Ion (Li-Ion) technology is used to combine efficiency and performance, making this battery ideal for replacing aging systems or use as a convenient spare. Each one is safeguarded with a chip which authenticates with Lenovo systems.
*Many factors cause battery life to differ. These include: screen brightness, battery conditioning, features, applications, power management and other customer preferences.Lithium-Ion (Li-Ion) technology
9 cell system battery
Over-discharge protection to prolong the life of the battery
Battery energy (Watt-hours): 100Wh
Battery Safeguard chip authenticates with Lenovo systems
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