Mechanic BA27 is a battery activation and detection board compatible with both iPhone and Android devices. It enables technicians to activate, test, and diagnose mobile phone batteries efficiently. The board supports multiple battery types and offers accurate measurements of battery voltage and current, helping identify battery issues like overcharging or undercharging. It features a user-friendly interface with clear indicators, making it easy to operate. Mechanic BA27 is a valuable tool for mobile phone repair professionals, ensuring batteries are functioning correctly before reinstallation.