This digital battery tester is designed for testing 6V and 12V standby SLA, cyclic GEL and car FLOODED batteries. Simple in operation, the ACT 612 simulates a full 20 hour (C20) discharge test in seconds and displays the DC Voltage results and Ah capacity available. ACT 612 Lead Acid Intelligent Battery Tester for 6V/12V SLA, GEL and FLOODED batteries. Replaces the GOLD-PLUS