Multi-step charge, optimize and maintenance program ideal for all 12 V sealed-starter and deep cycle AGM, EFB and lead-acid batteries, Advanced maintenance program keeps batteries 100% read while supporting *always on* circuitry, Includes premium weatherproof permanent battery lead and handlebar hanging hook, Delivers 4 A of charging power for the larger AGM batteries used in the V-twins, Safe low-volt pulsing recovery for accidentally discharged flat batteries, Drag Specialties OptiMate 5 is able to save batteries from as low as 0.5V, Able to desulphate deep discharged batteries below 4V