Discover the reliable solution to your power needs with the BTI notebook battery, designed specifically for select notebook models. This battery, featuring a robust 4540 mAh capacity and 70 Wh energy, ensures your device remains powered through long meetings, travel, or any situation where a power source might not be readily available. Crafted with high-quality lithium-ion cells, it not only provides a reliable power supply but also maintains its charge efficiently, offering peace of mind for those on-the-go. Its 4-cell design and 15.4 V output deliver a stable and safe power source, enhancing your notebook's performance. Moreover, its precise compatibility with HP 917724-856 models makes it an ideal replacement or backup battery, ensuring your notebook operates at its best, anytime and anywhere.