DR. BATTERY Brand New Dr. Battery Replacement Laptop Battery Compatible Lenovo Original Battery Part Numbers: L13L4A61 L13L4E61 L13M4A61 L13M4E61 L13S4A61 L13S4E61 Professional Series battery designed for Lenovo Flex 2 14 and Flex 2 15 Series laptops Built with OEM-grade cells for stable performance and reliable battery life Integrated safety protection against over-charge, over-discharge, overheating, and short-circuit Please confirm your original battery part number and voltage before purchase