Lenovo, Thinkpad, battery, T440, 57+6cellThinkpad battery, T440, 57+6cell ,Stay unplugged longer with these genuine Lenovo batteries. These rechargeable batteries use Lithium Ion technology and can be used as replacement for aging system batteries or as a convenient spare battery. Lithium ion technology 6 cell system battery Over discharge protection to prolong the life of the battery Battery energy (Watt hours): 57Wh Battery Safeguard chip authenticates with Lenovo systems ,Battery Che
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