Visit for the newest manuals, firmware, and software Warnings: The EOS 0610i DUOII is a carefully-designed charger with many built-in safety features, such as reverse polarity protection, input voltage error warning, and cell-count mismatch warnings for lithium chemistry batteries. HOWEVER, IT IS THE RESPONSIBILITY OF THE USER TO INSURE THAT THE CHARGER IS CONFIGURED AND USED IN A SAFE MANNER IN PROPER ENVIRONMENT. • Always be sure that the charger is properly configured for the correct battery