Dual Cells Design:Engineered with 2 Cells for enhanced performance and durability in your laptop. Compatible with Multiple Models:Designed to fit a wide range of models, including Sony VAIO E15 and AVITA NS series laptops. Li-ion Technology:Features advanced Li-ion technology for reliable, safe, and efficient power delivery. High Capacity 4900mAh:Boasts a robust 4900mAh capacity, ensuring your laptop stays powered for longer periods.