Capacity for Extended Runtime: This 21.6V 12800mAh lithiumion battery provides longer cleaning sessions between charges, helping you cover large spaces or tackle deep cleaning tasks more efficiently. Seamless Compatibility: Engineered to fit precisely with select cord handheld vacuum models, ensuring easy installation and reliable performance while maintaining suction power. Durable and Reliable Performance: Built with quality lithiumion cells to deliver stable power output and longlasting durability for repeated use and sustained efficiency. Smart LED Charge Indicator: Includes a userfriendly LED display that shows realtime power levels, aiding usage planning and preventing unexpected power loss during cleaning. Use scenarios: Large homes or multiroom cleaning with fewer interruptions due to extended runtime. Deep cleaning tasks in upholstery and traffic areas with steady suction. Busy households requiring quick battery swaps to minimize downtime between tasks.