Products by TecMate will make your life as an amateur or professional mechanic much easier! OptiMate 3 is a 5-volt charger for 12V batteries that diagnoses, restores, charges, tests, and maintains the battery automatically. It is done in the same way as the two million OptiMate that has been manufactured since 1995, but now it is microprocessor-controlled, lightweight and more effective than ever. It also has global inputs (100-240V). Did you forget your battery during the winter? OptiMate 3 restores it after it has been discharged and charges it back to its optimal state. It then checks that the charging current delivered is the best possible before it then checks how well the battery can keep the charge. It simultaneously indicates the battery status quickly. Of course, it keeps the battery at full charge safely for several months at a time. This extends the life span by up to 400%! No wonder that 10 major motorcycle manufacturers recommend OptiMate ... - Optimizes battery power and service life - Restores damaged batteries - Safe long-term maintenance cycle - Tests the battery every hour OptiMate 3 is the perfect charger for those who have multiple vehicles/batteries as it can charge multiple at the same time. Perfect for the MC shop or repair shop where fully-charged batteries are important!