Suitable for all types of 12V lead-acid batteries of rated capacity from 3 to 50Ah. Diagnoses sulfated battery condition. Recovers severely neglected batteries from as low as 2 volts. Automatic hourly test, advance warning of problems. Interactive float charge, max 800mA possible. No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected. Global input (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed. Imported.