New, the box is open, the battery is still sealed in the plastic. The NinjaBatt High Performance Acer AS10D31 AS10D51 Laptop Battery is a reliable and durable replacement battery designed specifically for Acer laptops. Made in China, this laptop battery is compatible with Acer models and offers high performance for extended usage. Upgrade your laptop's battery capacity with this quality product to keep your device powered up for longer periods without needing frequent recharges. Keep your laptop running smoothly with the NinjaBatt High Performance Laptop Battery.