Optimate 3 ChargerCaracteristicas: OptiMate 3 is 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