The 18V High-Capacity Lithium Battery Pack is a dependable power source designed for extended runtime in Field King, Smith, and LESCO backpack sprayers. This 4.0Ah lithium-ion battery delivers longer operating time than the standard battery while maintaining consistent spray pressure from start to finish. With a quick-swap design and durable construction, it is engineered specifically for sprayer applications, ensuring proper fit, safe operation, and reliable performance.