OptiMate 2 is a smart-maintainer charger and the cost-efficient pisolution for the long-term maintenance of 12 V batteries of any sia vehicle/boat stored indoors or outdoors. OptiMate 2 is weatherproof, very easy to use, just plug it da into the battery and plug pinearby power outlet, the rest is fully automatic. With a constant current of 0.8 A, Optimate 2 automatically and completely charges the battery and then switches to the exclusive energy-saving maintenance charge mode to keep the battery 100% ready, without ever overloading and, at the same time, provides power to the computer on board, monitor or burglar alarm. OptiMate 2 is proven to extend battery life by up to 400%; le can last 8 years if maintained with OptiMate 2. In order for cito occur, optimate 2 must always be connected to the battery when the vehicle is stationary and OptiMate 2 will keep the battery 100% safely, without overload, thanks to its exclusive cycle da 30 min of charge and 30 min break for each hour of long-term maintenance charge. Recommended for STD (with removable filling cap), absorbed glass mat (AGM) and 12V lead-acid sealed GEL batteries up to 50 AH, it can service batteries even pilarge ones (charging will last più for a long time). It weighs only 1 lb (450 grams) cables included and accepts any alternating power supply between 100 and 240 V C.A.: OptiMate 2 is a real globetrotter. Includes 2 connection accessories: (si see le images on the right) Permanent connector ad SAE-71 ring with weatherproof cap and SAE-74 battery clip set. Fully automatic operation that includes all le features such as reverse polarity da protection and sparkless connection: da UL and CSA approved, safety standard for automatic chargers. Warranty limited to 3 years.