5B11M90056 Lenovo Internal lithium-ion battery, 57Wh capacity, 4-cell design, compatible with specific ThinkPad systems. 57 Wh Internal lithium-ion battery, 57Wh capacity, 4-cell design, compatible with specific ThinkPad systems. Power your Lenovo ThinkPad with the reliable internal 57Wh Lithium-Ion battery, engineered for exceptional performance and longevity. This high-capacity battery ensures that you stay productive on the go, providing an uninterrupted power source when you're away from your desk. Its advanced LiIon chemistry ensures efficient energy management and a longer lifespan for your device, allowing you to maximize the usability of your laptop without frequent recharges. Designed to seamlessly integrate with select ThinkPad models, this battery ensures plug-and-play functionality and perfect compatibility with your system. The lightweight design (0.5 kg net weight) minimizes impact on portability, enabling you to carry your device effortlessly. Lenovo's commitment to quality reassures you of its reliability, backed by a 3-month warranty for peace of mind. Available , a trusted distributor for IT products, you can be confident in receiving genuine Lenovo components accompanied by expert support to help optimize your IT investments.