[Compatible with Hikoki / Hitachi 18V Batteries]: Designed for use with Hikoki and Hitachi 18V lithium-ion batteries. The adapter features a secure fit for easy installation and removal. Built-in protections include overload, no-load shutdown, overcurrent, and low-voltage protection. [Convenient Cigarette Lighter Interface]: Equipped with a standard cigarette lighter socket for simple connection to automotive power outlets. No additional wiring or complex setup required. [Widely Applicable]: Functions as a portable 12V power source or voltage regulator for a variety of 12V devices. Suitable for power tools, electric wheels, motors, vehicles, robots, golf carts, LED light strips, fans, displays, monitoring systems, solar applications, and other DIY projects. Note: This product does not include a battery. Please verify compatibility with your existing 18V battery before purchase. The seller is not responsible for issues arising from incompatible batteries. [Buck Converter Specifications]: Input Voltage: DC 18V–20V Output Voltage: DC 12V; adjustable DC 5V–13V Output Current: up to 10A Efficiency: ≥ 95% Features automatic low-voltage cutoff at 14.4V to protect both the battery and connected 12V devices. Intended for DIY use — assembly required. Color: Black Material: Plastic Package Includes: 1 x Adapter