Charger Optimate 2 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.
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