The BTI notebook battery, crafted by Battery Technology, is a high-quality power solution for your notebook. It features a robust 4590 mAh capacity and 34 Wh energy capacity, powered by lithium-ion technology, to ensure your notebook remains operational for longer periods. This battery is specifically designed to match the performance and fit of the Lenovo 45N1748, providing users with a reliable and efficient power source. Its durable construction and technology make it an essential accessory for anyone looking to extend the usability of their notebook without constant recharging. Whether you're working from a cafe or in transit, this battery ensures your notebook stays powered through your tasks.