The OptiMate 2 smart charger-maintainer is the most cost effective solution for long term maintenance of a 12V batteries in any vehicle / craft that is stored in or outdoors.
OptiMate 2 is weatherproof, very easy to use, simply connect to the battery and plug it into the nearest power socket, the rest is fully automatic. With 0.8A constant current OptiMate 2 automatically brings the battery to full charge and then switches to the unique OptiMate battery saving maintenance charge mode to keep the battery at 100% ready and at the same time provides power to the on board computer, display or anti theft alarm.
OptiMate 2 has been proven to extend battery life to 400%; batteries can last 8 years if maintained with OptiMate 2. To make this work always hook up OptiMate 2 to the battery when the vehicle is parked and OptiMate 2 will safely maintain the battery at 100%, never overcharging, thanks to its unique 30 min charge, 30 min rest cycle during every hour of long term maintenance charge.