Compatible with 6V and 12V, 5.1 Amp lead acid batteries up to 105 Ah and LiFePO4 batteries up to 60 Ah. Includes Low Battery Start and Cold / Winter Mode. Charge and maintain up to five (5x), 6-volt or 12-volt, lead-acid or lithium-ion automotive, marine, and deep-cycle batteries. Fully automatic for everyday worry-free battery charging. Designed to fully charge your batteries and will never overcharge. The built-in microcontroller continuously monitors battery charge condition to provide precise charge voltage and current to give your battery an optimum charge. After the charge cycle is completed, the Charge DNA 5.0+ x5 continues to monitor the battery to maintain it at full charge. Your battery will be ready when you are.