Drag Specialties OptiMate 5, the fully sealed 12V 4A battery saving charger & maintainer for all motorcycle batteriesFor lead-acid (Pb) 12V powersport battery types including STD (with filler caps) and sealed VRLA such as AGM & GEL.Diagnoses sulphated battery condition and saves a deep discharged battery from as low as 0.5 Volts.Fully automatic multi-step program brings the battery safely to full charge and tests battery state of health.Maintains battery at full charge and good health – connect and forget, no supervision required!Fully sealed (IP54). Rated for use down to -40°C. Includes handlebar hanging hook.