Battery Technology (BTI) is a global supplier of replacement batteries and AC power adapters for notebook computers, batteries for digital cameras, PDA's, and other mobile devices, and batteries for APC UPS systems. Features 100% OEM compatible and 30-40% less expensive than the OEM. Replacement battery equivalent to the original Lenovo L17M3P53 battery. Compatible with Lenovo ThinkPad L14, L15, L480, L490, L580, L590 laptops. Features 4050mAh capacity and three cells. Battery energy: 45Wh. Li-ion chemistry allows for long-lasting quality without memory effect. 11. 1V output voltage. 18-month manufacturer limited warranty