The HiKOKI UC18YSL3WA3 Booster Pack is a versatile power supply solution for professional tools operating at 18V or 36V. This system includes three 5Ah lithium-ion batteries and a compatible charger, providing extended runtime for demanding applications. The Booster Pack delivers 5Ah capacity when used with 18V tools and 2.5Ah capacity when configured for 36V tools, allowing flexibility for various voltage requirements. The batteries, equipped with advanced Li-Ion technology, feature fast charging capabilities with approximately 32 minutes of charge time when using the included charger. The charger operates on standard 220V power with 50/60 Hz frequency compatibility. Each battery is of the BSL36A18 model, designed for durability and consistent performance in professional environments. The system is designed for seamless integration with HiKOKI power tools, ensuring reliable operation and extended working hours without frequent battery changes. Its compact design and efficient power management make this Booster Pack suitable for construction, woodworking, and various industrial applications where continuous power supply is essential. The lithium-ion chemistry provides stable voltage output throughout the entire discharge cycle, maintaining tool performance until battery depletion. This power supply system represents the successor to earlier battery configurations, incorporating improved energy density and thermal management for increased reliability. The complete package includes three batteries and a charger, offering a comprehensive power supply solution for professionals who require multiple battery rotations during extended work sessions. The robust construction ensures resilience against typical job site conditions while maintaining consistent electrical performance across various environmental conditions.