The 16.8V li ion battery charger is microprocessor controlled to charge and maintain the cells of 14.6 volt Lithium ion batteries- maximizing their performance and life span. The product is battery recharger approved by UL/cUL, TUV/CE, RCM and complies to the Department of Energy Level VI Efficiency regulation. The charger 16.8V 3A enables long run times by providing precision charging control and status monitoring. The battery charger 14.6 volt is equipped to prevent backflow of current into the unit from the battery for safe operation. The battery charger 14.8 volt features other protection functions including short circuit and accurate fast charging while protecting the cells from over-charging.