The Lenovo Laptop Battery 4100mAh, 3-Cell is a high-performance replacement battery designed for Lenovo L19D3PD3 models, including IdeaPad S540-13IML, S540-13ARE, S540-13API, and S540-13ITL laptops. Crafted with premium-grade lithium-ion cells, it delivers reliable power, extended backup, and consistent performance for work, study, or entertainment. Its compact 3-cell design ensures lightweight portability while maintaining durability and safety standards. With advanced protection circuits against overcharge, overheat, and short-circuit, this battery guarantees long life and stable performance—perfect for users who demand dependable energy efficiency and mobility.