capacity for extended runtime: This 21.6V 12800mAh battery provides strong power for longer cleaning sessions without frequent recharges, making it suitable for large homes or deep cleaning tasks. Seamless compatibility: Designed to fit specific cord handheld vacuum models, this battery enables easy installation and reliable performance while maintaining suction power for consistent cleaning results. Durable and reliable performance: Built with lithiumion cells, it delivers stable power output and long lasting durability, supporting repeated use while maintaining efficiency over time. Smart LED charge indicator: The user friendly LED display shows real time power levels, helping you manage usage effectively and avoid unexpected power loss during cleaning tasks. Use scenario 1: Clean a large home with multiple rooms and levels, reducing the need for frequent recharges during a single cleaning session. Use scenario 2: Clean inside a car, stairs, or upholstery where extended runtime improves efficiency and reduces interruptions. Use scenario 3: Use during professional or deep cleaning tasks that require consistent suction power over longer periods without swapping batteries.