The Pro-Cut International X19 Cordless Rotor Matching System is the only rotor-matching system powered by a 48V 50Ah rechargeable battery, which can perform over 30 brake jobs on a single charge or indefinitely if plugged into wall power. Its battery comes with protection against overcharge, over-discharge, short circuit, over-current, and high temperatures. It uses a variable-speed DC motor that delivers clean, consistent power. The X19's computer system features disc tracking, maintenance alerts, variable speed control, and a battery management system. It also features a power meter for live readout of power usage and battery state of charge.