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.The ThinkPad Battery 57+ (6 cell) features:- 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 systemsAkutehnoloogiaLiitiumioon (Li-Ion)OtstarveSülearvuti/tahvelAku pinge10,8 VKaasasolevate akude arv1Aku mahtuvus (vatt-tundides)57 WhAkuelementide arv6Toote värvMustÜhilduvad tootedThinkPad T440p, L440, L540Kasutamistemperatuur (T-T)5 - 35 °CSuhteline õhuniiskus kasutamisel (H-H)8 - 95 protsentiLaius206,2 mmSügavus51,5 mmKõrgus20,1 mmKaal330 g