Elevate your notebook's performance with the BTI notebook battery, a high-quality power solution designed by Battery Technology. This battery has a robust 6890 mAh capacity and 51 Wh of energy, ensuring that your device stays powered longer, whether you're working on critical projects or enjoying multimedia entertainment. Crafted with advanced lithium-ion technology, it features a 4-cell design that not only provides reliable performance but also maintains an efficient operation with its 7.4 V output. The BTI notebook battery is engineered to match the specifications of the Dell 451-BBLK, offering seamless compatibility and a reliable replacement or backup option. With this battery, you're enhancing your notebook's reliability and your productivity.